45319513 has 4 divisors (see below), whose sum is σ = 45957888. Its totient is φ = 44681140.

The previous prime is 45319481. The next prime is 45319543. The reversal of 45319513 is 31591354.

It is a happy number.

45319513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31591354 = 2 ⋅15795677.

It is a cyclic number.

It is not a de Polignac number, because 45319513 - 2⁵ = 45319481 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45319543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319081 + ... + 319222.

It is an arithmetic number, because the mean of its divisors is an integer number (11489472).

Almost surely, 2^45319513 is an apocalyptic number.

It is an amenable number.

45319513 is a deficient number, since it is larger than the sum of its proper divisors (638375).

45319513 is an equidigital number, since it uses as much as digits as its factorization.

45319513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638374.

The product of its digits is 8100, while the sum is 31.

The square root of 45319513 is about 6731.9769013270. The cubic root of 45319513 is about 356.5291781873.

The spelling of 45319513 in words is "forty-five million, three hundred nineteen thousand, five hundred thirteen".