31774081 has 2 divisors, whose sum is σ = 31774082. Its totient is φ = 31774080.

The previous prime is 31774073. The next prime is 31774087. The reversal of 31774081 is 18047713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24591681 + 7182400 = 4959^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 31774081 - 2³ = 31774073 is a prime.

It is a super-2 number, since 2×31774081² = 2019184446789122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31774087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15887040 + 15887041.

It is an arithmetic number, because the mean of its divisors is an integer number (15887041).

Almost surely, 2^31774081 is an apocalyptic number.

It is an amenable number.

31774081 is a deficient number, since it is larger than the sum of its proper divisors (1).

31774081 is an equidigital number, since it uses as much as digits as its factorization.

31774081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 31774081 is about 5636.8502729805. The cubic root of 31774081 is about 316.7313117638.

The spelling of 31774081 in words is "thirty-one million, seven hundred seventy-four thousand, eighty-one".