31406031 has 12 divisors (see below), whose sum is σ = 47752120. Its totient is φ = 19835280.

The previous prime is 31406029. The next prime is 31406047. The reversal of 31406031 is 13060413.

It is not a de Polignac number, because 31406031 - 2¹ = 31406029 is a prime.

It is a super-2 number, since 2×31406031² = 1972677566345922, 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 = 31405995 and 31406013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31406731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91660 + ... + 92001.

Almost surely, 2^31406031 is an apocalyptic number.

31406031 is a deficient number, since it is larger than the sum of its proper divisors (16346089).

31406031 is a wasteful number, since it uses less digits than its factorization.

31406031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183686 (or 183683 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 31406031 is about 5604.1084036624. The cubic root of 31406031 is about 315.5036237019.

Adding to 31406031 its reverse (13060413), we get a palindrome (44466444).

The spelling of 31406031 in words is "thirty-one million, four hundred six thousand, thirty-one".