31960045 has 32 divisors (see below), whose sum is σ = 43168608. Its totient is φ = 22560768.

The previous prime is 31960043. The next prime is 31960067. The reversal of 31960045 is 54006913.

It can be written as a sum of positive squares in 16 ways, for example, as 5148361 + 26811684 = 2269^2 + 5178^2 .

It is a cyclic number.

It is not a de Polignac number, because 31960045 - 2¹ = 31960043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31959995 and 31960022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31960043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233217 + ... + 233353.

It is an arithmetic number, because the mean of its divisors is an integer number (1349019).

Almost surely, 2^31960045 is an apocalyptic number.

It is an amenable number.

31960045 is a deficient number, since it is larger than the sum of its proper divisors (11208563).

31960045 is a wasteful number, since it uses less digits than its factorization.

31960045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 31960045 is about 5653.3215900035. The cubic root of 31960045 is about 317.3480207592.

Adding to 31960045 its reverse (54006913), we get a palindrome (85966958).

The spelling of 31960045 in words is "thirty-one million, nine hundred sixty thousand, forty-five".