45931591 has 2 divisors, whose sum is σ = 45931592. Its totient is φ = 45931590.

The previous prime is 45931583. The next prime is 45931609. The reversal of 45931591 is 19513954.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45931591 - 2³ = 45931583 is a prime.

It is a super-2 number, since 2×45931591² = 4219422103582562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 45931591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45941591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22965795 + 22965796.

It is an arithmetic number, because the mean of its divisors is an integer number (22965796).

Almost surely, 2^45931591 is an apocalyptic number.

45931591 is a deficient number, since it is larger than the sum of its proper divisors (1).

45931591 is an equidigital number, since it uses as much as digits as its factorization.

45931591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 37.

The square root of 45931591 is about 6777.2849283470. The cubic root of 45931591 is about 358.1270810661.

The spelling of 45931591 in words is "forty-five million, nine hundred thirty-one thousand, five hundred ninety-one".