1521450000 has 720 divisors, whose sum is σ = 6625825920. Its totient is φ = 332640000.

The previous prime is 1521449999. The next prime is 1521450001. The reversal of 1521450000 is 541251.

1521450000 is a `hidden beast` number, since 152 + 14 + 500 + 0 + 0 = 666.

1521450000 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1521449999) and next prime (1521450001).

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1521450001) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 66149989 + ... + 66150011.

It is an arithmetic number, because the mean of its divisors is an integer number (9202536).

Almost surely, 2^1521450000 is an apocalyptic number.

1521450000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1521450000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3312912960).

1521450000 is an abundant number, since it is smaller than the sum of its proper divisors (5104375920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1521450000 is an equidigital number, since it uses as much as digits as its factorization.

1521450000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1521450000 is about 39005.7688041141. The cubic root of 1521450000 is about 1150.1449092757.

Adding to 1521450000 its reverse (541251), we get a palindrome (1521991251).

The spelling of 1521450000 in words is "one billion, five hundred twenty-one million, four hundred fifty thousand".