31110157 has 8 divisors (see below), whose sum is σ = 33730200. Its totient is φ = 28522560.

The previous prime is 31110151. The next prime is 31110161. The reversal of 31110157 is 75101113.

It can be written as a sum of positive squares in 4 ways, for example, as 3924361 + 27185796 = 1981^2 + 5214^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31110157 - 2⁷ = 31110029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31110151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6094 + ... + 9967.

It is an arithmetic number, because the mean of its divisors is an integer number (4216275).

Almost surely, 2^31110157 is an apocalyptic number.

It is an amenable number.

31110157 is a deficient number, since it is larger than the sum of its proper divisors (2620043).

31110157 is a wasteful number, since it uses less digits than its factorization.

31110157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16223.

The product of its (nonzero) digits is 105, while the sum is 19.

The square root of 31110157 is about 5577.6479810042. The cubic root of 31110157 is about 314.5097168423.

The spelling of 31110157 in words is "thirty-one million, one hundred ten thousand, one hundred fifty-seven".