15521521152 has 80 divisors (see below), whose sum is σ = 43782746832. Its totient is φ = 4869488640.

The previous prime is 15521521139. The next prime is 15521521153. The reversal of 15521521152 is 25112512551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15521521153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271099 + ... + 323322.

Almost surely, 2^15521521152 is an apocalyptic number.

15521521152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15521521152 is an abundant number, since it is smaller than the sum of its proper divisors (28261225680).

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

15521521152 is an equidigital number, since it uses as much as digits as its factorization.

15521521152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594459 (or 594443 counting only the distinct ones).

The product of its digits is 5000, while the sum is 30.

The spelling of 15521521152 in words is "fifteen billion, five hundred twenty-one million, five hundred twenty-one thousand, one hundred fifty-two".