157217172 has 48 divisors (see below), whose sum is σ = 441315840. Its totient is φ = 42554592.

The previous prime is 157217147. The next prime is 157217197. The reversal of 157217172 is 271712751.

It is an interprime number because it is at equal distance from previous prime (157217147) and next prime (157217197).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47658 + ... + 50849.

It is an arithmetic number, because the mean of its divisors is an integer number (9194080).

Almost surely, 2^157217172 is an apocalyptic number.

157217172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

157217172 is an abundant number, since it is smaller than the sum of its proper divisors (284098668).

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

157217172 is a wasteful number, since it uses less digits than its factorization.

157217172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98540 (or 98538 counting only the distinct ones).

The product of its digits is 6860, while the sum is 33.

The square root of 157217172 is about 12538.6271975843. The cubic root of 157217172 is about 539.7176988092.

The spelling of 157217172 in words is "one hundred fifty-seven million, two hundred seventeen thousand, one hundred seventy-two".