157081971 has 8 divisors (see below), whose sum is σ = 211364560. Its totient is φ = 103760352.

The previous prime is 157081937. The next prime is 157081997. The reversal of 157081971 is 179180751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157081971 - 2⁹ = 157081459 is a prime.

It is a super-2 number, since 2×157081971² = 49349491226489682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157081471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239860 + ... + 240513.

It is an arithmetic number, because the mean of its divisors is an integer number (26420570).

Almost surely, 2^157081971 is an apocalyptic number.

157081971 is a deficient number, since it is larger than the sum of its proper divisors (54282589).

157081971 is a wasteful number, since it uses less digits than its factorization.

157081971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480485.

The product of its (nonzero) digits is 17640, while the sum is 39.

The square root of 157081971 is about 12533.2346582995. The cubic root of 157081971 is about 539.5629419656.

The spelling of 157081971 in words is "one hundred fifty-seven million, eighty-one thousand, nine hundred seventy-one".