31338641 has 4 divisors (see below), whose sum is σ = 31431972. Its totient is φ = 31245312.

The previous prime is 31338623. The next prime is 31338649. The reversal of 31338641 is 14683313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2876416 + 28462225 = 1696^2 + 5335^2 .

It is a cyclic number.

It is not a de Polignac number, because 31338641 - 2⁶ = 31338577 is a prime.

It is a super-4 number, since 4×31338641⁴ (a number of 31 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31338649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46160 + ... + 46833.

It is an arithmetic number, because the mean of its divisors is an integer number (7857993).

Almost surely, 2^31338641 is an apocalyptic number.

It is an amenable number.

31338641 is a deficient number, since it is larger than the sum of its proper divisors (93331).

31338641 is an equidigital number, since it uses as much as digits as its factorization.

31338641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93330.

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

The square root of 31338641 is about 5598.0926215989. The cubic root of 31338641 is about 315.2777964293.

The spelling of 31338641 in words is "thirty-one million, three hundred thirty-eight thousand, six hundred forty-one".