1530421500 has 96 divisors (see below), whose sum is σ = 4691232000. Its totient is φ = 386625600.

The previous prime is 1530421499. The next prime is 1530421511. The reversal of 1530421500 is 51240351.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1651 + ... + 55349.

It is an arithmetic number, because the mean of its divisors is an integer number (48867000).

Almost surely, 2^1530421500 is an apocalyptic number.

1530421500 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 1530421500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2345616000).

1530421500 is an abundant number, since it is smaller than the sum of its proper divisors (3160810500).

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

1530421500 is a wasteful number, since it uses less digits than its factorization.

1530421500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53740 (or 53728 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1530421500 is about 39120.6019892332. The cubic root of 1530421500 is about 1152.4011581531.

Adding to 1530421500 its reverse (51240351), we get a palindrome (1581661851).

The spelling of 1530421500 in words is "one billion, five hundred thirty million, four hundred twenty-one thousand, five hundred".