157672251 has 48 divisors (see below), whose sum is σ = 262149888. Its totient is φ = 93895200.

The previous prime is 157672243. The next prime is 157672253. The reversal of 157672251 is 152276751.

It is not a de Polignac number, because 157672251 - 2³ = 157672243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157672253) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 162570 + ... + 163536.

It is an arithmetic number, because the mean of its divisors is an integer number (5461456).

Almost surely, 2^157672251 is an apocalyptic number.

157672251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

157672251 is a deficient number, since it is larger than the sum of its proper divisors (104477637).

157672251 is an equidigital number, since it uses as much as digits as its factorization.

157672251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054 (or 1042 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 157672251 is about 12556.7611667978. The cubic root of 157672251 is about 540.2379506873.

The spelling of 157672251 in words is "one hundred fifty-seven million, six hundred seventy-two thousand, two hundred fifty-one".