31104631 has 2 divisors, whose sum is σ = 31104632. Its totient is φ = 31104630.

The previous prime is 31104599. The next prime is 31104649. The reversal of 31104631 is 13640113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31104631 - 2⁵ = 31104599 is a prime.

It is a super-2 number, since 2×31104631² = 1934996139292322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31104599 and 31104608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31104331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15552315 + 15552316.

It is an arithmetic number, because the mean of its divisors is an integer number (15552316).

Almost surely, 2^31104631 is an apocalyptic number.

31104631 is a deficient number, since it is larger than the sum of its proper divisors (1).

31104631 is an equidigital number, since it uses as much as digits as its factorization.

31104631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 31104631 is about 5577.1525889113. The cubic root of 31104631 is about 314.4910939468.

Adding to 31104631 its reverse (13640113), we get a palindrome (44744744).

The spelling of 31104631 in words is "thirty-one million, one hundred four thousand, six hundred thirty-one".