45091513 has 4 divisors (see below), whose sum is σ = 46191348. Its totient is φ = 43991680.

The previous prime is 45091511. The next prime is 45091537. The reversal of 45091513 is 31519054.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3139984 + 41951529 = 1772^2 + 6477^2 .

It is a cyclic number.

It is not a de Polignac number, because 45091513 - 2¹ = 45091511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45091511) 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 in 3 ways as a sum of consecutive naturals, for example, 549856 + ... + 549937.

It is an arithmetic number, because the mean of its divisors is an integer number (11547837).

Almost surely, 2^45091513 is an apocalyptic number.

It is an amenable number.

45091513 is a deficient number, since it is larger than the sum of its proper divisors (1099835).

45091513 is a wasteful number, since it uses less digits than its factorization.

45091513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099834.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 45091513 is about 6715.0214444929. The cubic root of 45091513 is about 355.9302797650.

The spelling of 45091513 in words is "forty-five million, ninety-one thousand, five hundred thirteen".