1542215500 has 96 divisors (see below), whose sum is σ = 3953738880. Its totient is φ = 514425600.

The previous prime is 1542215471. The next prime is 1542215501. The reversal of 1542215500 is 55122451.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1542215501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123546 + ... + 135454.

It is an arithmetic number, because the mean of its divisors is an integer number (41184780).

Almost surely, 2^1542215500 is an apocalyptic number.

1542215500 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 1542215500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1976869440).

1542215500 is an abundant number, since it is smaller than the sum of its proper divisors (2411523380).

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

1542215500 is a wasteful number, since it uses less digits than its factorization.

1542215500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11972 (or 11960 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1542215500 is about 39271.0516793223. The cubic root of 1542215500 is about 1155.3538642002.

Adding to 1542215500 its reverse (55122451), we get a palindrome (1597337951).

The spelling of 1542215500 in words is "one billion, five hundred forty-two million, two hundred fifteen thousand, five hundred".