15513145252 has 72 divisors (see below), whose sum is σ = 32450258232. Its totient is φ = 6457144320.

The previous prime is 15513145187. The next prime is 15513145273. The reversal of 15513145252 is 25254131551.

It can be written as a sum of positive squares in 4 ways, for example, as 10344110436 + 5169034816 = 101706^2 + 71896^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 278958 + ... + 329914.

It is an arithmetic number, because the mean of its divisors is an integer number (450698031).

Almost surely, 2^15513145252 is an apocalyptic number.

It is an amenable number.

15513145252 is an abundant number, since it is smaller than the sum of its proper divisors (16937112980).

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

15513145252 is a wasteful number, since it uses less digits than its factorization.

15513145252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51037 (or 51024 counting only the distinct ones).

The product of its digits is 30000, while the sum is 34.

The spelling of 15513145252 in words is "fifteen billion, five hundred thirteen million, one hundred forty-five thousand, two hundred fifty-two".