31948031 has 2 divisors, whose sum is σ = 31948032. Its totient is φ = 31948030.

The previous prime is 31948013. The next prime is 31948043. The reversal of 31948031 is 13084913.

Together with previous prime (31948013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31948031 is a prime.

It is a super-2 number, since 2×31948031² = 2041353369553922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31947985 and 31948003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31948001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15974015 + 15974016.

It is an arithmetic number, because the mean of its divisors is an integer number (15974016).

Almost surely, 2^31948031 is an apocalyptic number.

31948031 is a deficient number, since it is larger than the sum of its proper divisors (1).

31948031 is an equidigital number, since it uses as much as digits as its factorization.

31948031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 31948031 is about 5652.2589289593. The cubic root of 31948031 is about 317.3082513434.

The spelling of 31948031 in words is "thirty-one million, nine hundred forty-eight thousand, thirty-one".