163157031 has 8 divisors (see below), whose sum is σ = 241714160. Its totient is φ = 108771336.

The previous prime is 163157021. The next prime is 163157063. The reversal of 163157031 is 130751361.

163157031 is a `hidden beast` number, since 1 + 63 + 1 + 570 + 31 = 666.

163157031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-163157031 is a prime.

It is a super-2 number, since 2×163157031² = 53240433529469922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 6042853 = 163157031 / (1 + 6 + 3 + 1 + 5 + 7 + 0 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163156986 and 163157004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163157011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3021400 + ... + 3021453.

It is an arithmetic number, because the mean of its divisors is an integer number (30214270).

Almost surely, 2^163157031 is an apocalyptic number.

163157031 is a deficient number, since it is larger than the sum of its proper divisors (78557129).

163157031 is an equidigital number, since it uses as much as digits as its factorization.

163157031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6042862 (or 6042856 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 163157031 is about 12773.2936629516. The cubic root of 163157031 is about 546.4309181203.

The spelling of 163157031 in words is "one hundred sixty-three million, one hundred fifty-seven thousand, thirty-one".