31002197 has 2 divisors, whose sum is σ = 31002198. Its totient is φ = 31002196.

The previous prime is 31002161. The next prime is 31002211. The reversal of 31002197 is 79120013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29658916 + 1343281 = 5446^2 + 1159^2 .

It is a cyclic number.

It is not a de Polignac number, because 31002197 - 2⁸ = 31001941 is a prime.

It is a super-2 number, since 2×31002197² = 1922272437653618, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31002157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15501098 + 15501099.

It is an arithmetic number, because the mean of its divisors is an integer number (15501099).

Almost surely, 2^31002197 is an apocalyptic number.

It is an amenable number.

31002197 is a deficient number, since it is larger than the sum of its proper divisors (1).

31002197 is an equidigital number, since it uses as much as digits as its factorization.

31002197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 31002197 is about 5567.9616557588. The cubic root of 31002197 is about 314.1454861534.

The spelling of 31002197 in words is "thirty-one million, two thousand, one hundred ninety-seven".