57198247 has 2 divisors, whose sum is σ = 57198248. Its totient is φ = 57198246.

The previous prime is 57198223. The next prime is 57198259. The reversal of 57198247 is 74289175.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57198247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57198287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28599123 + 28599124.

It is an arithmetic number, because the mean of its divisors is an integer number (28599124).

Almost surely, 2^57198247 is an apocalyptic number.

57198247 is a deficient number, since it is larger than the sum of its proper divisors (1).

57198247 is an equidigital number, since it uses as much as digits as its factorization.

57198247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 43.

The square root of 57198247 is about 7562.9522674680. The cubic root of 57198247 is about 385.2957686754.

The spelling of 57198247 in words is "fifty-seven million, one hundred ninety-eight thousand, two hundred forty-seven".