57355247 has 2 divisors, whose sum is σ = 57355248. Its totient is φ = 57355246.

The previous prime is 57355231. The next prime is 57355267. The reversal of 57355247 is 74255375.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57355247 - 2⁴ = 57355231 is a prime.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 57355247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57355267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28677623 + 28677624.

It is an arithmetic number, because the mean of its divisors is an integer number (28677624).

Almost surely, 2^57355247 is an apocalyptic number.

57355247 is a deficient number, since it is larger than the sum of its proper divisors (1).

57355247 is an equidigital number, since it uses as much as digits as its factorization.

57355247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147000, while the sum is 38.

The square root of 57355247 is about 7573.3246992322. The cubic root of 57355247 is about 385.6479716226.

The spelling of 57355247 in words is "fifty-seven million, three hundred fifty-five thousand, two hundred forty-seven".