57642553 has 2 divisors, whose sum is σ = 57642554. Its totient is φ = 57642552.

The previous prime is 57642551. The next prime is 57642581. The reversal of 57642553 is 35524675.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38044224 + 19598329 = 6168^2 + 4427^2 .

It is a cyclic number.

It is not a de Polignac number, because 57642553 - 2¹ = 57642551 is a prime.

Together with 57642551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (57642551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28821276 + 28821277.

It is an arithmetic number, because the mean of its divisors is an integer number (28821277).

Almost surely, 2^57642553 is an apocalyptic number.

It is an amenable number.

57642553 is a deficient number, since it is larger than the sum of its proper divisors (1).

57642553 is an equidigital number, since it uses as much as digits as its factorization.

57642553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126000, while the sum is 37.

The square root of 57642553 is about 7592.2692918521. The cubic root of 57642553 is about 386.2908333715.

The spelling of 57642553 in words is "fifty-seven million, six hundred forty-two thousand, five hundred fifty-three".