6431157 has 10 divisors (see below), whose sum is σ = 9607158. Its totient is φ = 4287384.

The previous prime is 6431141. The next prime is 6431171. The reversal of 6431157 is 7511346.

6431157 is a `hidden beast` number, since 643 + 1 + 15 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4704561 + 1726596 = 2169^2 + 1314^2 .

It is not a de Polignac number, because 6431157 - 2⁴ = 6431141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

6431157 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6431157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6431857) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39618 + ... + 39779.

Almost surely, 2^6431157 is an apocalyptic number.

It is an amenable number.

6431157 is a deficient number, since it is larger than the sum of its proper divisors (3176001).

6431157 is an equidigital number, since it uses as much as digits as its factorization.

6431157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79409 (or 79400 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 6431157 is about 2535.9725944891. The cubic root of 6431157 is about 185.9643532104.

The spelling of 6431157 in words is "six million, four hundred thirty-one thousand, one hundred fifty-seven".