157323820631 has 4 divisors (see below), whose sum is σ = 157790657232. Its totient is φ = 156856984032.

The previous prime is 157323820603. The next prime is 157323820639. The reversal of 157323820631 is 136028323751.

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 157323820631 - 2⁶ = 157323820567 is a prime.

It is a super-2 number, since 2×157323820631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157323820639) 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, 233417795 + ... + 233418468.

It is an arithmetic number, because the mean of its divisors is an integer number (39447664308).

Almost surely, 2^157323820631 is an apocalyptic number.

157323820631 is a deficient number, since it is larger than the sum of its proper divisors (466836601).

157323820631 is an equidigital number, since it uses as much as digits as its factorization.

157323820631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466836600.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 157323820631 in words is "one hundred fifty-seven billion, three hundred twenty-three million, eight hundred twenty thousand, six hundred thirty-one".