57420031 has 2 divisors, whose sum is σ = 57420032. Its totient is φ = 57420030.

The previous prime is 57420017. The next prime is 57420037. The reversal of 57420031 is 13002475.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57420031 - 2⁷ = 57419903 is a prime.

It is a super-2 number, since 2×57420031² = 6594119920081922, which contains 22 as substring.

It is equal to p_3418024 and since 57420031 and 3418024 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 57419984 and 57420011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57420037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28710015 + 28710016.

It is an arithmetic number, because the mean of its divisors is an integer number (28710016).

Almost surely, 2^57420031 is an apocalyptic number.

57420031 is a deficient number, since it is larger than the sum of its proper divisors (1).

57420031 is an equidigital number, since it uses as much as digits as its factorization.

57420031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 57420031 is about 7577.6006096917. The cubic root of 57420031 is about 385.7931162479.

The spelling of 57420031 in words is "fifty-seven million, four hundred twenty thousand, thirty-one".