45511591 has 8 divisors (see below), whose sum is σ = 46826640. Its totient is φ = 44201088.

The previous prime is 45511589. The next prime is 45511607. The reversal of 45511591 is 19511554.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45511591 - 2¹ = 45511589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45511561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35520 + ... + 36778.

It is an arithmetic number, because the mean of its divisors is an integer number (5853330).

Almost surely, 2^45511591 is an apocalyptic number.

45511591 is a deficient number, since it is larger than the sum of its proper divisors (1315049).

45511591 is a wasteful number, since it uses less digits than its factorization.

45511591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273.

The product of its digits is 4500, while the sum is 31.

The square root of 45511591 is about 6746.2279089874. The cubic root of 45511591 is about 357.0321616023.

The spelling of 45511591 in words is "forty-five million, five hundred eleven thousand, five hundred ninety-one".