157343391 has 20 divisors (see below), whose sum is σ = 245266032. Its totient is φ = 100333728.

The previous prime is 157343387. The next prime is 157343399. The reversal of 157343391 is 193343751.

It is not a de Polignac number, because 157343391 - 2² = 157343387 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157343399) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 40366 + ... + 44091.

Almost surely, 2^157343391 is an apocalyptic number.

157343391 is a deficient number, since it is larger than the sum of its proper divisors (87922641).

157343391 is an equidigital number, since it uses as much as digits as its factorization.

157343391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84492 (or 84483 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 157343391 is about 12543.6593942916. The cubic root of 157343391 is about 539.8620944142.

The spelling of 157343391 in words is "one hundred fifty-seven million, three hundred forty-three thousand, three hundred ninety-one".