57220511 has 2 divisors, whose sum is σ = 57220512. Its totient is φ = 57220510.

The previous prime is 57220507. The next prime is 57220519. The reversal of 57220511 is 11502275.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57220511 - 2² = 57220507 is a prime.

It is a super-2 number, since 2×57220511² = 6548373758202242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57220519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28610255 + 28610256.

It is an arithmetic number, because the mean of its divisors is an integer number (28610256).

Almost surely, 2^57220511 is an apocalyptic number.

57220511 is a deficient number, since it is larger than the sum of its proper divisors (1).

57220511 is an equidigital number, since it uses as much as digits as its factorization.

57220511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 57220511 is about 7564.4240362370. The cubic root of 57220511 is about 385.3457533788.

Adding to 57220511 its reverse (11502275), we get a palindrome (68722786).

The spelling of 57220511 in words is "fifty-seven million, two hundred twenty thousand, five hundred eleven".