45505591 has 2 divisors, whose sum is σ = 45505592. Its totient is φ = 45505590.

The previous prime is 45505571. The next prime is 45505619. The reversal of 45505591 is 19550554.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45505591 - 2²¹ = 43408439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45505561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22752795 + 22752796.

It is an arithmetic number, because the mean of its divisors is an integer number (22752796).

Almost surely, 2^45505591 is an apocalyptic number.

45505591 is a deficient number, since it is larger than the sum of its proper divisors (1).

45505591 is an equidigital number, since it uses as much as digits as its factorization.

45505591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 45505591 is about 6745.7832013785. The cubic root of 45505591 is about 357.0164711883.

The spelling of 45505591 in words is "forty-five million, five hundred five thousand, five hundred ninety-one".