157992031 has 2 divisors, whose sum is σ = 157992032. Its totient is φ = 157992030.

The previous prime is 157991959. The next prime is 157992041. The reversal of 157992031 is 130299751.

It is a strong prime.

It is an emirp because it is prime and its reverse (130299751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157992031 - 2¹⁹ = 157467743 is a prime.

It is a super-2 number, since 2×157992031² = 49922963719009922, which contains 22 as substring.

It is equal to p_8868223 and since 157992031 and 8868223 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157992041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78996015 + 78996016.

It is an arithmetic number, because the mean of its divisors is an integer number (78996016).

Almost surely, 2^157992031 is an apocalyptic number.

157992031 is a deficient number, since it is larger than the sum of its proper divisors (1).

157992031 is an equidigital number, since it uses as much as digits as its factorization.

157992031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 157992031 is about 12569.4880961796. The cubic root of 157992031 is about 540.6029285252.

The spelling of 157992031 in words is "one hundred fifty-seven million, nine hundred ninety-two thousand, thirty-one".