47312557 has 2 divisors, whose sum is σ = 47312558. Its totient is φ = 47312556.

The previous prime is 47312549. The next prime is 47312569. The reversal of 47312557 is 75521374.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46977316 + 335241 = 6854^2 + 579^2 .

It is a cyclic number.

It is not a de Polignac number, because 47312557 - 2³ = 47312549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47315557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23656278 + 23656279.

It is an arithmetic number, because the mean of its divisors is an integer number (23656279).

Almost surely, 2^47312557 is an apocalyptic number.

It is an amenable number.

47312557 is a deficient number, since it is larger than the sum of its proper divisors (1).

47312557 is an equidigital number, since it uses as much as digits as its factorization.

47312557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29400, while the sum is 34.

The square root of 47312557 is about 6878.4123894980. The cubic root of 47312557 is about 361.6808155842.

The spelling of 47312557 in words is "forty-seven million, three hundred twelve thousand, five hundred fifty-seven".