31264661 has 2 divisors, whose sum is σ = 31264662. Its totient is φ = 31264660.

The previous prime is 31264627. The next prime is 31264663. The reversal of 31264661 is 16646213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29495761 + 1768900 = 5431^2 + 1330^2 .

It is a cyclic number.

It is not a de Polignac number, because 31264661 - 2¹⁴ = 31248277 is a prime.

Together with 31264663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31264663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15632330 + 15632331.

It is an arithmetic number, because the mean of its divisors is an integer number (15632331).

Almost surely, 2^31264661 is an apocalyptic number.

It is an amenable number.

31264661 is a deficient number, since it is larger than the sum of its proper divisors (1).

31264661 is an equidigital number, since it uses as much as digits as its factorization.

31264661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 29.

The square root of 31264661 is about 5591.4811096882. The cubic root of 31264661 is about 315.0295126459.

The spelling of 31264661 in words is "thirty-one million, two hundred sixty-four thousand, six hundred sixty-one".