157321512 has 24 divisors (see below), whose sum is σ = 426079290. Its totient is φ = 52440480.

The previous prime is 157321481. The next prime is 157321513. The reversal of 157321512 is 215123751.

It can be written as a sum of positive squares in only one way, i.e., 149670756 + 7650756 = 12234^2 + 2766^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×157321512² = 49500116275932288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157321513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1092439 + ... + 1092582.

Almost surely, 2^157321512 is an apocalyptic number.

157321512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

157321512 is an abundant number, since it is smaller than the sum of its proper divisors (268757778).

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

157321512 is a wasteful number, since it uses less digits than its factorization.

157321512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185033 (or 2185026 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 157321512 is about 12542.7872500493. The cubic root of 157321512 is about 539.8370701870.

The spelling of 157321512 in words is "one hundred fifty-seven million, three hundred twenty-one thousand, five hundred twelve".