45181947 has 4 divisors (see below), whose sum is σ = 60242600. Its totient is φ = 30121296.

The previous prime is 45181883. The next prime is 45181967. The reversal of 45181947 is 74918154.

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

It is not a de Polignac number, because 45181947 - 2⁶ = 45181883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45181967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7530322 + ... + 7530327.

It is an arithmetic number, because the mean of its divisors is an integer number (15060650).

Almost surely, 2^45181947 is an apocalyptic number.

45181947 is a deficient number, since it is larger than the sum of its proper divisors (15060653).

45181947 is a wasteful number, since it uses less digits than its factorization.

45181947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15060652.

The product of its digits is 40320, while the sum is 39.

The square root of 45181947 is about 6721.7517806001. The cubic root of 45181947 is about 356.1680680774.

The spelling of 45181947 in words is "forty-five million, one hundred eighty-one thousand, nine hundred forty-seven".