57731397 has 16 divisors (see below), whose sum is σ = 78693888. Its totient is φ = 37638000.

The previous prime is 57731353. The next prime is 57731407. The reversal of 57731397 is 79313775.

57731397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 57731397 - 2¹⁰ = 57730373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57731197) 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 15 ways as a sum of consecutive naturals, for example, 24522 + ... + 26772.

It is an arithmetic number, because the mean of its divisors is an integer number (4918368).

Almost surely, 2^57731397 is an apocalyptic number.

It is an amenable number.

57731397 is a deficient number, since it is larger than the sum of its proper divisors (20962491).

57731397 is a wasteful number, since it uses less digits than its factorization.

57731397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440.

The product of its digits is 138915, while the sum is 42.

The square root of 57731397 is about 7598.1179906606. The cubic root of 57731397 is about 386.4891938067.

The spelling of 57731397 in words is "fifty-seven million, seven hundred thirty-one thousand, three hundred ninety-seven".