157522221252 has 72 divisors (see below), whose sum is σ = 434433373920. Its totient is φ = 47728081920.

The previous prime is 157522221251. The next prime is 157522221271. The reversal of 157522221252 is 252122225751.

157522221252 is a `hidden beast` number, since 1 + 5 + 7 + 522 + 2 + 2 + 125 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (157522221251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3995428 + ... + 4034660.

It is an arithmetic number, because the mean of its divisors is an integer number (6033796860).

Almost surely, 2^157522221252 is an apocalyptic number.

157522221252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

157522221252 is an abundant number, since it is smaller than the sum of its proper divisors (276911152668).

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

157522221252 is a wasteful number, since it uses less digits than its factorization.

157522221252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49393 (or 49388 counting only the distinct ones).

The product of its digits is 56000, while the sum is 36.

The spelling of 157522221252 in words is "one hundred fifty-seven billion, five hundred twenty-two million, two hundred twenty-one thousand, two hundred fifty-two".