31045331 has 12 divisors (see below), whose sum is σ = 33445776. Its totient is φ = 28741680.

The previous prime is 31045319. The next prime is 31045351. The reversal of 31045331 is 13354013.

It is a happy number.

It is not a de Polignac number, because 31045331 - 2¹⁴ = 31028947 is a prime.

It is a super-2 number, since 2×31045331² = 1927625153799122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31045351) 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, 162446 + ... + 162636.

It is an arithmetic number, because the mean of its divisors is an integer number (2787148).

Almost surely, 2^31045331 is an apocalyptic number.

31045331 is a deficient number, since it is larger than the sum of its proper divisors (2400445).

31045331 is an equidigital number, since it uses as much as digits as its factorization.

31045331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 31045331 is about 5571.8337197013. The cubic root of 31045331 is about 314.2911110152.

Adding to 31045331 its reverse (13354013), we get a palindrome (44399344).

The spelling of 31045331 in words is "thirty-one million, forty-five thousand, three hundred thirty-one".