31880417 has 2 divisors, whose sum is σ = 31880418. Its totient is φ = 31880416.

The previous prime is 31880413. The next prime is 31880419. The reversal of 31880417 is 71408813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31820881 + 59536 = 5641^2 + 244^2 .

It is a cyclic number.

It is not a de Polignac number, because 31880417 - 2² = 31880413 is a prime.

Together with 31880419, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31880413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15940208 + 15940209.

It is an arithmetic number, because the mean of its divisors is an integer number (15940209).

Almost surely, 2^31880417 is an apocalyptic number.

It is an amenable number.

31880417 is a deficient number, since it is larger than the sum of its proper divisors (1).

31880417 is an equidigital number, since it uses as much as digits as its factorization.

31880417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 31880417 is about 5646.2746125211. The cubic root of 31880417 is about 317.0842455388.

The spelling of 31880417 in words is "thirty-one million, eight hundred eighty thousand, four hundred seventeen".