57551993 has 2 divisors, whose sum is σ = 57551994. Its totient is φ = 57551992.

The previous prime is 57551981. The next prime is 57552023. The reversal of 57551993 is 39915575.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31214569 + 26337424 = 5587^2 + 5132^2 .

It is a cyclic number.

It is not a de Polignac number, because 57551993 - 2¹⁴ = 57535609 is a prime.

It is not a weakly prime, because it can be changed into another prime (57551933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28775996 + 28775997.

It is an arithmetic number, because the mean of its divisors is an integer number (28775997).

Almost surely, 2^57551993 is an apocalyptic number.

It is an amenable number.

57551993 is a deficient number, since it is larger than the sum of its proper divisors (1).

57551993 is an equidigital number, since it uses as much as digits as its factorization.

57551993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 212625, while the sum is 44.

The square root of 57551993 is about 7586.3029863037. The cubic root of 57551993 is about 386.0884317779.

The spelling of 57551993 in words is "fifty-seven million, five hundred fifty-one thousand, nine hundred ninety-three".