157959731 has 4 divisors (see below), whose sum is σ = 157999464. Its totient is φ = 157920000.

The previous prime is 157959721. The next prime is 157959743. The reversal of 157959731 is 137959751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137959751 = 359 ⋅384289.

It is a cyclic number.

It is not a de Polignac number, because 157959731 - 2²² = 153765427 is a prime.

It is a super-2 number, since 2×157959731² = 49902553235184722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157959721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13145 + ... + 22106.

It is an arithmetic number, because the mean of its divisors is an integer number (39499866).

Almost surely, 2^157959731 is an apocalyptic number.

157959731 is a deficient number, since it is larger than the sum of its proper divisors (39733).

157959731 is an equidigital number, since it uses as much as digits as its factorization.

157959731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39732.

The product of its digits is 297675, while the sum is 47.

The square root of 157959731 is about 12568.2031730872. The cubic root of 157959731 is about 540.5660856023.

The spelling of 157959731 in words is "one hundred fifty-seven million, nine hundred fifty-nine thousand, seven hundred thirty-one".