231674557 has 2 divisors, whose sum is σ = 231674558. Its totient is φ = 231674556.

The previous prime is 231674549. The next prime is 231674579. The reversal of 231674557 is 755476132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174081636 + 57592921 = 13194^2 + 7589^2 .

It is a cyclic number.

It is not a de Polignac number, because 231674557 - 2³ = 231674549 is a prime.

It is a super-2 number, since 2×231674557² = 107346200722292498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231674857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115837278 + 115837279.

It is an arithmetic number, because the mean of its divisors is an integer number (115837279).

Almost surely, 2^231674557 is an apocalyptic number.

It is an amenable number.

231674557 is a deficient number, since it is larger than the sum of its proper divisors (1).

231674557 is an equidigital number, since it uses as much as digits as its factorization.

231674557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 40.

The square root of 231674557 is about 15220.8592727218. The cubic root of 231674557 is about 614.1759134428.

The spelling of 231674557 in words is "two hundred thirty-one million, six hundred seventy-four thousand, five hundred fifty-seven".