57122761 has 2 divisors, whose sum is σ = 57122762. Its totient is φ = 57122760.

The previous prime is 57122753. The next prime is 57122773. The reversal of 57122761 is 16722175.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52649536 + 4473225 = 7256^2 + 2115^2 .

It is a cyclic number.

It is not a de Polignac number, because 57122761 - 2³ = 57122753 is a prime.

It is not a weakly prime, because it can be changed into another prime (57123761) 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, 28561380 + 28561381.

It is an arithmetic number, because the mean of its divisors is an integer number (28561381).

Almost surely, 2^57122761 is an apocalyptic number.

It is an amenable number.

57122761 is a deficient number, since it is larger than the sum of its proper divisors (1).

57122761 is an equidigital number, since it uses as much as digits as its factorization.

57122761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5880, while the sum is 31.

The square root of 57122761 is about 7557.9601083890. The cubic root of 57122761 is about 385.1261991414.

It can be divided in two parts, 571 and 22761, that added together give a palindrome (23332).

The spelling of 57122761 in words is "fifty-seven million, one hundred twenty-two thousand, seven hundred sixty-one".