57642551 has 2 divisors, whose sum is σ = 57642552. Its totient is φ = 57642550.

The previous prime is 57642521. The next prime is 57642553. The reversal of 57642551 is 15524675.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57642551 is a prime.

Together with 57642553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57642553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28821275 + 28821276.

It is an arithmetic number, because the mean of its divisors is an integer number (28821276).

Almost surely, 2^57642551 is an apocalyptic number.

57642551 is a deficient number, since it is larger than the sum of its proper divisors (1).

57642551 is an equidigital number, since it uses as much as digits as its factorization.

57642551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42000, while the sum is 35.

The square root of 57642551 is about 7592.2691601391. The cubic root of 57642551 is about 386.2908289039.

The spelling of 57642551 in words is "fifty-seven million, six hundred forty-two thousand, five hundred fifty-one".