45204815 has 4 divisors (see below), whose sum is σ = 54245784. Its totient is φ = 36163848.

The previous prime is 45204811. The next prime is 45204847. The reversal of 45204815 is 51840254.

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

It is a cyclic number.

It is not a de Polignac number, because 45204815 - 2² = 45204811 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 (45204811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4520477 + ... + 4520486.

It is an arithmetic number, because the mean of its divisors is an integer number (13561446).

Almost surely, 2^45204815 is an apocalyptic number.

45204815 is a deficient number, since it is larger than the sum of its proper divisors (9040969).

45204815 is an equidigital number, since it uses as much as digits as its factorization.

45204815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9040968.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 45204815 is about 6723.4526100806. The cubic root of 45204815 is about 356.2281472181.

The spelling of 45204815 in words is "forty-five million, two hundred four thousand, eight hundred fifteen".