45431591 has 2 divisors, whose sum is σ = 45431592. Its totient is φ = 45431590.

The previous prime is 45431587. The next prime is 45431611. The reversal of 45431591 is 19513454.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45431591 - 2² = 45431587 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45431291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22715795 + 22715796.

It is an arithmetic number, because the mean of its divisors is an integer number (22715796).

Almost surely, 2^45431591 is an apocalyptic number.

45431591 is a deficient number, since it is larger than the sum of its proper divisors (1).

45431591 is an equidigital number, since it uses as much as digits as its factorization.

45431591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 32.

The square root of 45431591 is about 6740.2960617468. The cubic root of 45431591 is about 356.8228425815.

The spelling of 45431591 in words is "forty-five million, four hundred thirty-one thousand, five hundred ninety-one".