57223997 has 2 divisors, whose sum is σ = 57223998. Its totient is φ = 57223996.

The previous prime is 57223979. The next prime is 57224021. The reversal of 57223997 is 79932275.

It is a happy number.

Together with previous prime (57223979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40691641 + 16532356 = 6379^2 + 4066^2 .

It is a cyclic number.

It is not a de Polignac number, because 57223997 - 2¹² = 57219901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57223697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28611998 + 28611999.

It is an arithmetic number, because the mean of its divisors is an integer number (28611999).

Almost surely, 2^57223997 is an apocalyptic number.

It is an amenable number.

57223997 is a deficient number, since it is larger than the sum of its proper divisors (1).

57223997 is an equidigital number, since it uses as much as digits as its factorization.

57223997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 44.

The square root of 57223997 is about 7564.6544534433. The cubic root of 57223997 is about 385.3535785916.

The spelling of 57223997 in words is "fifty-seven million, two hundred twenty-three thousand, nine hundred ninety-seven".