57432981 has 12 divisors (see below), whose sum is σ = 77184128. Its totient is φ = 37986864.

The previous prime is 57432979. The next prime is 57432983. The reversal of 57432981 is 18923475.

It is an interprime number because it is at equal distance from previous prime (57432979) and next prime (57432983).

It is not a de Polignac number, because 57432981 - 2¹ = 57432979 is a prime.

It is a super-2 number, since 2×57432981² = 6597094613092722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57432983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195871 + ... + 196163.

Almost surely, 2^57432981 is an apocalyptic number.

It is an amenable number.

57432981 is a deficient number, since it is larger than the sum of its proper divisors (19751147).

57432981 is an equidigital number, since it uses as much as digits as its factorization.

57432981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812 (or 519 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 57432981 is about 7578.4550536373. The cubic root of 57432981 is about 385.8221168436.

The spelling of 57432981 in words is "fifty-seven million, four hundred thirty-two thousand, nine hundred eighty-one".