45172931 has 2 divisors, whose sum is σ = 45172932. Its totient is φ = 45172930.

The previous prime is 45172913. The next prime is 45172949. The reversal of 45172931 is 13927154.

Together with previous prime (45172913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (45172913) and next prime (45172949).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45172931 is a prime.

It is a super-2 number, since 2×45172931² = 4081187390261522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45172991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22586465 + 22586466.

It is an arithmetic number, because the mean of its divisors is an integer number (22586466).

Almost surely, 2^45172931 is an apocalyptic number.

45172931 is a deficient number, since it is larger than the sum of its proper divisors (1).

45172931 is an equidigital number, since it uses as much as digits as its factorization.

45172931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 45172931 is about 6721.0810886345. The cubic root of 45172931 is about 356.1443755399.

The spelling of 45172931 in words is "forty-five million, one hundred seventy-two thousand, nine hundred thirty-one".