31269961 has 8 divisors (see below), whose sum is σ = 31576104. Its totient is φ = 30965760.

The previous prime is 31269929. The next prime is 31269967. The reversal of 31269961 is 16996213.

It can be written as a sum of positive squares in 4 ways, for example, as 9703225 + 21566736 = 3115^2 + 4644^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31269961 - 2⁵ = 31269929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31269961.

It is not an unprimeable number, because it can be changed into a prime (31269967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72001 + ... + 72433.

It is an arithmetic number, because the mean of its divisors is an integer number (3947013).

Almost surely, 2^31269961 is an apocalyptic number.

It is an amenable number.

31269961 is a deficient number, since it is larger than the sum of its proper divisors (306143).

31269961 is a wasteful number, since it uses less digits than its factorization.

31269961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971.

The product of its digits is 17496, while the sum is 37.

The square root of 31269961 is about 5591.9550248549. The cubic root of 31269961 is about 315.0473129571.

The spelling of 31269961 in words is "thirty-one million, two hundred sixty-nine thousand, nine hundred sixty-one".