31264031 has 2 divisors, whose sum is σ = 31264032. Its totient is φ = 31264030.

The previous prime is 31264021. The next prime is 31264033. The reversal of 31264031 is 13046213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31264031 - 2¹⁰ = 31263007 is a prime.

It is a super-2 number, since 2×31264031² = 1954879268737922, which contains 22 as substring.

Together with 31264033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31263994 and 31264012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31264033) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15632015 + 15632016.

It is an arithmetic number, because the mean of its divisors is an integer number (15632016).

Almost surely, 2^31264031 is an apocalyptic number.

31264031 is a deficient number, since it is larger than the sum of its proper divisors (1).

31264031 is an equidigital number, since it uses as much as digits as its factorization.

31264031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 31264031 is about 5591.4247737048. The cubic root of 31264031 is about 315.0273966261.

The spelling of 31264031 in words is "thirty-one million, two hundred sixty-four thousand, thirty-one".