31274491 has 2 divisors, whose sum is σ = 31274492. Its totient is φ = 31274490.

The previous prime is 31274479. The next prime is 31274519. The reversal of 31274491 is 19447213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31274491 - 2¹⁵ = 31241723 is a prime.

It is a Chen prime.

It is equal to p_1931791 and since 31274491 and 1931791 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (31274401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15637245 + 15637246.

It is an arithmetic number, because the mean of its divisors is an integer number (15637246).

Almost surely, 2^31274491 is an apocalyptic number.

31274491 is a deficient number, since it is larger than the sum of its proper divisors (1).

31274491 is an equidigital number, since it uses as much as digits as its factorization.

31274491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 31274491 is about 5592.3600563626. The cubic root of 31274491 is about 315.0625255911.

The spelling of 31274491 in words is "thirty-one million, two hundred seventy-four thousand, four hundred ninety-one".