157172355 has 12 divisors (see below), whose sum is σ = 272432160. Its totient is φ = 83825232.

The previous prime is 157172341. The next prime is 157172357. The reversal of 157172355 is 553271751.

It is a happy number.

It is not a de Polignac number, because 157172355 - 2²¹ = 155075203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157172357) 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, 1746315 + ... + 1746404.

It is an arithmetic number, because the mean of its divisors is an integer number (22702680).

Almost surely, 2^157172355 is an apocalyptic number.

157172355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

157172355 is a deficient number, since it is larger than the sum of its proper divisors (115259805).

157172355 is a wasteful number, since it uses less digits than its factorization.

157172355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492730 (or 3492727 counting only the distinct ones).

The product of its digits is 36750, while the sum is 36.

The square root of 157172355 is about 12536.8399128329. The cubic root of 157172355 is about 539.6664091895. Note that the first 3 decimals are identical.

The spelling of 157172355 in words is "one hundred fifty-seven million, one hundred seventy-two thousand, three hundred fifty-five".