47105257 has 2 divisors, whose sum is σ = 47105258. Its totient is φ = 47105256.

The previous prime is 47105231. The next prime is 47105263. The reversal of 47105257 is 75250174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38081241 + 9024016 = 6171^2 + 3004^2 .

It is a cyclic number.

It is not a de Polignac number, because 47105257 - 2²³ = 38716649 is a prime.

It is not a weakly prime, because it can be changed into another prime (47105057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23552628 + 23552629.

It is an arithmetic number, because the mean of its divisors is an integer number (23552629).

Almost surely, 2^47105257 is an apocalyptic number.

It is an amenable number.

47105257 is a deficient number, since it is larger than the sum of its proper divisors (1).

47105257 is an equidigital number, since it uses as much as digits as its factorization.

47105257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 47105257 is about 6863.3269629240. The cubic root of 47105257 is about 361.1518073022.

The spelling of 47105257 in words is "forty-seven million, one hundred five thousand, two hundred fifty-seven".