45204109 has 4 divisors (see below), whose sum is σ = 45534204. Its totient is φ = 44874016.

The previous prime is 45204101. The next prime is 45204149. The reversal of 45204109 is 90140254.

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 16281225 + 28922884 = 4035^2 + 5378^2 .

It is a cyclic number.

It is not a de Polignac number, because 45204109 - 2³ = 45204101 is a prime.

It is a super-2 number, since 2×45204109² = 4086822940967762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45204101) 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, 164842 + ... + 165115.

It is an arithmetic number, because the mean of its divisors is an integer number (11383551).

Almost surely, 2^45204109 is an apocalyptic number.

It is an amenable number.

45204109 is a deficient number, since it is larger than the sum of its proper divisors (330095).

45204109 is a wasteful number, since it uses less digits than its factorization.

45204109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330094.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 45204109 is about 6723.4001070887. The cubic root of 45204109 is about 356.2262927078.

The spelling of 45204109 in words is "forty-five million, two hundred four thousand, one hundred nine".