57721234 has 16 divisors (see below), whose sum is σ = 88619040. Its totient is φ = 28188000.

The previous prime is 57721231. The next prime is 57721241. The reversal of 57721234 is 43212775.

It is a junction number, because it is equal to n+sod(n) for n = 57721196 and 57721205.

It is not an unprimeable number, because it can be changed into a prime (57721231) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 17734 + ... + 20734.

It is an arithmetic number, because the mean of its divisors is an integer number (5538690).

Almost surely, 2^57721234 is an apocalyptic number.

57721234 is a deficient number, since it is larger than the sum of its proper divisors (30897806).

57721234 is a wasteful number, since it uses less digits than its factorization.

57721234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225.

The product of its digits is 11760, while the sum is 31.

The square root of 57721234 is about 7597.4491771910. The cubic root of 57721234 is about 386.4665133683.

The spelling of 57721234 in words is "fifty-seven million, seven hundred twenty-one thousand, two hundred thirty-four".