45640031 has 2 divisors, whose sum is σ = 45640032. Its totient is φ = 45640030.

The previous prime is 45640013. The next prime is 45640051. The reversal of 45640031 is 13004654.

It is a happy number.

Together with previous prime (45640013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45640031 - 2¹⁴ = 45623647 is a prime.

It is a super-2 number, since 2×45640031² = 4166024859361922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 45639979 and 45640006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45640051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22820015 + 22820016.

It is an arithmetic number, because the mean of its divisors is an integer number (22820016).

Almost surely, 2^45640031 is an apocalyptic number.

45640031 is a deficient number, since it is larger than the sum of its proper divisors (1).

45640031 is an equidigital number, since it uses as much as digits as its factorization.

45640031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 45640031 is about 6755.7405959673. The cubic root of 45640031 is about 357.3677108465.

Adding to 45640031 its reverse (13004654), we get a palindrome (58644685).

The spelling of 45640031 in words is "forty-five million, six hundred forty thousand, thirty-one".