157156331 has 2 divisors, whose sum is σ = 157156332. Its totient is φ = 157156330.

The previous prime is 157156301. The next prime is 157156333. The reversal of 157156331 is 133651751.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157156331 is a prime.

It is a super-2 number, since 2×157156331² = 49396224746763122, which contains 22 as substring.

Together with 157156333, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_8823920 and since 157156331 and 8823920 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (157156333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78578165 + 78578166.

It is an arithmetic number, because the mean of its divisors is an integer number (78578166).

Almost surely, 2^157156331 is an apocalyptic number.

157156331 is a deficient number, since it is larger than the sum of its proper divisors (1).

157156331 is an equidigital number, since it uses as much as digits as its factorization.

157156331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9450, while the sum is 32.

The square root of 157156331 is about 12536.2008200252. The cubic root of 157156331 is about 539.6480685840.

The spelling of 157156331 in words is "one hundred fifty-seven million, one hundred fifty-six thousand, three hundred thirty-one".