157731456 has 32 divisors (see below), whose sum is σ = 418975200. Its totient is φ = 52577024.

The previous prime is 157731449. The next prime is 157731473. The reversal of 157731456 is 654137751.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204996 + ... + 205763.

It is an arithmetic number, because the mean of its divisors is an integer number (13092975).

Almost surely, 2^157731456 is an apocalyptic number.

157731456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

157731456 is an abundant number, since it is smaller than the sum of its proper divisors (261243744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157731456 is an equidigital number, since it uses as much as digits as its factorization.

157731456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410776 (or 410764 counting only the distinct ones).

The product of its digits is 88200, while the sum is 39.

The square root of 157731456 is about 12559.1184404002. The cubic root of 157731456 is about 540.3055609467.

It can be divided in two parts, 1577 and 31456, that added together give a palindrome (33033).

The spelling of 157731456 in words is "one hundred fifty-seven million, seven hundred thirty-one thousand, four hundred fifty-six".