57231909 has 24 divisors (see below), whose sum is σ = 94914560. Its totient is φ = 32552928.

The previous prime is 57231883. The next prime is 57231919. The reversal of 57231909 is 90913275.

It is not a de Polignac number, because 57231909 - 2¹² = 57227813 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57231919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12444 + ... + 16410.

Almost surely, 2^57231909 is an apocalyptic number.

It is an amenable number.

57231909 is a deficient number, since it is larger than the sum of its proper divisors (37682651).

57231909 is a wasteful number, since it uses less digits than its factorization.

57231909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4209 (or 4206 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 57231909 is about 7565.1773938223. The cubic root of 57231909 is about 385.3713379068.

The spelling of 57231909 in words is "fifty-seven million, two hundred thirty-one thousand, nine hundred nine".