31367961 has 12 divisors (see below), whose sum is σ = 45819540. Its totient is φ = 20676480.

The previous prime is 31367953. The next prime is 31367981. The reversal of 31367961 is 16976313.

It can be written as a sum of positive squares in 2 ways, for example, as 9884736 + 21483225 = 3144^2 + 4635^2 .

It is not a de Polignac number, because 31367961 - 2³ = 31367953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31367951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18780 + ... + 20381.

It is an arithmetic number, because the mean of its divisors is an integer number (3818295).

Almost surely, 2^31367961 is an apocalyptic number.

It is an amenable number.

31367961 is a deficient number, since it is larger than the sum of its proper divisors (14451579).

31367961 is a wasteful number, since it uses less digits than its factorization.

31367961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39256 (or 39253 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 31367961 is about 5600.7107584663. The cubic root of 31367961 is about 315.3760889670.

The spelling of 31367961 in words is "thirty-one million, three hundred sixty-seven thousand, nine hundred sixty-one".