157212371 has 4 divisors (see below), whose sum is σ = 161461392. Its totient is φ = 152963352.

The previous prime is 157212361. The next prime is 157212401. The reversal of 157212371 is 173212751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157212371 - 2²² = 153018067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157212361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2124455 + ... + 2124528.

It is an arithmetic number, because the mean of its divisors is an integer number (40365348).

Almost surely, 2^157212371 is an apocalyptic number.

157212371 is a deficient number, since it is larger than the sum of its proper divisors (4249021).

157212371 is an equidigital number, since it uses as much as digits as its factorization.

157212371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249020.

The product of its digits is 2940, while the sum is 29.

The square root of 157212371 is about 12538.4357477319. The cubic root of 157212371 is about 539.7122048990.

The spelling of 157212371 in words is "one hundred fifty-seven million, two hundred twelve thousand, three hundred seventy-one".