201431957 has 2 divisors, whose sum is σ = 201431958. Its totient is φ = 201431956.

The previous prime is 201431927. The next prime is 201432013. The reversal of 201431957 is 759134102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150822961 + 50608996 = 12281^2 + 7114^2 .

It is a cyclic number.

It is not a de Polignac number, because 201431957 - 2⁸ = 201431701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201431927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100715978 + 100715979.

It is an arithmetic number, because the mean of its divisors is an integer number (100715979).

Almost surely, 2^201431957 is an apocalyptic number.

It is an amenable number.

201431957 is a deficient number, since it is larger than the sum of its proper divisors (1).

201431957 is an equidigital number, since it uses as much as digits as its factorization.

201431957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 201431957 is about 14192.6726517594. The cubic root of 201431957 is about 586.1959191069.

The spelling of 201431957 in words is "two hundred one million, four hundred thirty-one thousand, nine hundred fifty-seven".