57056551 has 2 divisors, whose sum is σ = 57056552. Its totient is φ = 57056550.

The previous prime is 57056521. The next prime is 57056579. The reversal of 57056551 is 15565075.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57056551 - 2⁷ = 57056423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57056501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28528275 + 28528276.

It is an arithmetic number, because the mean of its divisors is an integer number (28528276).

Almost surely, 2^57056551 is an apocalyptic number.

57056551 is a deficient number, since it is larger than the sum of its proper divisors (1).

57056551 is an equidigital number, since it uses as much as digits as its factorization.

57056551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26250, while the sum is 34.

The square root of 57056551 is about 7553.5786882775. The cubic root of 57056551 is about 384.9773439189.

It can be divided in two parts, 570 and 56551, that added together give a square (57121 = 239²).

The spelling of 57056551 in words is "fifty-seven million, fifty-six thousand, five hundred fifty-one".