47557231 has 2 divisors, whose sum is σ = 47557232. Its totient is φ = 47557230.

The previous prime is 47557157. The next prime is 47557249. The reversal of 47557231 is 13275574.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47557231 - 2¹⁹ = 47032943 is a prime.

It is a super-2 number, since 2×47557231² = 4523380440774722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47557831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23778615 + 23778616.

It is an arithmetic number, because the mean of its divisors is an integer number (23778616).

Almost surely, 2^47557231 is an apocalyptic number.

47557231 is a deficient number, since it is larger than the sum of its proper divisors (1).

47557231 is an equidigital number, since it uses as much as digits as its factorization.

47557231 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 47557231 is about 6896.1750992851. The cubic root of 47557231 is about 362.3032140011.

The spelling of 47557231 in words is "forty-seven million, five hundred fifty-seven thousand, two hundred thirty-one".