57421031 has 2 divisors, whose sum is σ = 57421032. Its totient is φ = 57421030.

The previous prime is 57421027. The next prime is 57421051. The reversal of 57421031 is 13012475.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57421031 - 2² = 57421027 is a prime.

It is a super-2 number, since 2×57421031² = 6594349602205922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 57420988 and 57421006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57421051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28710515 + 28710516.

It is an arithmetic number, because the mean of its divisors is an integer number (28710516).

Almost surely, 2^57421031 is an apocalyptic number.

57421031 is a deficient number, since it is larger than the sum of its proper divisors (1).

57421031 is an equidigital number, since it uses as much as digits as its factorization.

57421031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 57421031 is about 7577.6665933518. Note that the first 3 decimals coincide. The cubic root of 57421031 is about 385.7953558315.

The spelling of 57421031 in words is "fifty-seven million, four hundred twenty-one thousand, thirty-one".