57223913 has 2 divisors, whose sum is σ = 57223914. Its totient is φ = 57223912.

The previous prime is 57223909. The next prime is 57223939. The reversal of 57223913 is 31932275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36820624 + 20403289 = 6068^2 + 4517^2 .

It is a cyclic number.

It is not a de Polignac number, because 57223913 - 2² = 57223909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57223913.

It is not a weakly prime, because it can be changed into another prime (57223213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28611956 + 28611957.

It is an arithmetic number, because the mean of its divisors is an integer number (28611957).

Almost surely, 2^57223913 is an apocalyptic number.

It is an amenable number.

57223913 is a deficient number, since it is larger than the sum of its proper divisors (1).

57223913 is an equidigital number, since it uses as much as digits as its factorization.

57223913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 32.

The square root of 57223913 is about 7564.6489013040. The cubic root of 57223913 is about 385.3533900360.

The spelling of 57223913 in words is "fifty-seven million, two hundred twenty-three thousand, nine hundred thirteen".