57492221 has 2 divisors, whose sum is σ = 57492222. Its totient is φ = 57492220.

The previous prime is 57492217. The next prime is 57492223. The reversal of 57492221 is 12229475.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56040196 + 1452025 = 7486^2 + 1205^2 .

It is a cyclic number.

It is not a de Polignac number, because 57492221 - 2² = 57492217 is a prime.

Together with 57492223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57492223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28746110 + 28746111.

It is an arithmetic number, because the mean of its divisors is an integer number (28746111).

Almost surely, 2^57492221 is an apocalyptic number.

It is an amenable number.

57492221 is a deficient number, since it is larger than the sum of its proper divisors (1).

57492221 is an equidigital number, since it uses as much as digits as its factorization.

57492221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 57492221 is about 7582.3624946319. The cubic root of 57492221 is about 385.9547250181.

The spelling of 57492221 in words is "fifty-seven million, four hundred ninety-two thousand, two hundred twenty-one".