31136031 has 6 divisors (see below), whose sum is σ = 44974280. Its totient is φ = 20757348.

The previous prime is 31136029. The next prime is 31136051. The reversal of 31136031 is 13063113.

It is not a de Polignac number, because 31136031 - 2¹ = 31136029 is a prime.

It is a super-2 number, since 2×31136031² = 1938904852865922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31135995 and 31136013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31136051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1729771 + ... + 1729788.

Almost surely, 2^31136031 is an apocalyptic number.

31136031 is a deficient number, since it is larger than the sum of its proper divisors (13838249).

31136031 is a wasteful number, since it uses less digits than its factorization.

31136031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3459565 (or 3459562 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 31136031 is about 5579.9669353859. The cubic root of 31136031 is about 314.5968841884.

Adding to 31136031 its reverse (13063113), we get a palindrome (44199144).

The spelling of 31136031 in words is "thirty-one million, one hundred thirty-six thousand, thirty-one".