57220535791 has 2 divisors, whose sum is σ = 57220535792. Its totient is φ = 57220535790.

The previous prime is 57220535789. The next prime is 57220535843. The reversal of 57220535791 is 19753502275.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57220535791 - 2¹ = 57220535789 is a prime.

It is a super-2 number, since 2×57220535791² (a number of 22 digits) contains 22 as substring.

Together with 57220535789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57220535711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28610267895 + 28610267896.

It is an arithmetic number, because the mean of its divisors is an integer number (28610267896).

Almost surely, 2^57220535791 is an apocalyptic number.

57220535791 is a deficient number, since it is larger than the sum of its proper divisors (1).

57220535791 is an equidigital number, since it uses as much as digits as its factorization.

57220535791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 661500, while the sum is 46.

The spelling of 57220535791 in words is "fifty-seven billion, two hundred twenty million, five hundred thirty-five thousand, seven hundred ninety-one".