157721932 has 12 divisors (see below), whose sum is σ = 276348240. Its totient is φ = 78765296.

The previous prime is 157721929. The next prime is 157721947. The reversal of 157721932 is 239127751.

157721932 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 157721891 and 157721900.

It is an unprimeable number.

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, 20143 + ... + 26854.

It is an arithmetic number, because the mean of its divisors is an integer number (23029020).

Almost surely, 2^157721932 is an apocalyptic number.

It is an amenable number.

157721932 is a deficient number, since it is larger than the sum of its proper divisors (118626308).

157721932 is a wasteful number, since it uses less digits than its factorization.

157721932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47840 (or 47838 counting only the distinct ones).

The product of its digits is 26460, while the sum is 37.

The square root of 157721932 is about 12558.7392679361. The cubic root of 157721932 is about 540.2946859784.

The spelling of 157721932 in words is "one hundred fifty-seven million, seven hundred twenty-one thousand, nine hundred thirty-two".