157152321 has 12 divisors (see below), whose sum is σ = 227120400. Its totient is φ = 104711640.

The previous prime is 157152293. The next prime is 157152371. The reversal of 157152321 is 123251751.

157152321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157152321 - 2¹³ = 157144129 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (157152371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19330 + ... + 26228.

It is an arithmetic number, because the mean of its divisors is an integer number (18926700).

Almost surely, 2^157152321 is an apocalyptic number.

It is an amenable number.

157152321 is a deficient number, since it is larger than the sum of its proper divisors (69968079).

157152321 is a wasteful number, since it uses less digits than its factorization.

157152321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9436 (or 9433 counting only the distinct ones).

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

The square root of 157152321 is about 12536.0408821924. The cubic root of 157152321 is about 539.6434786594.

The spelling of 157152321 in words is "one hundred fifty-seven million, one hundred fifty-two thousand, three hundred twenty-one".