45209220 has 48 divisors (see below), whose sum is σ = 144670848. Its totient is φ = 10333440.

The previous prime is 45209209. The next prime is 45209233. The reversal of 45209220 is 2290254.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53401 + ... + 54240.

It is an arithmetic number, because the mean of its divisors is an integer number (3013976).

Almost surely, 2^45209220 is an apocalyptic number.

It is an amenable number.

45209220 is an abundant number, since it is smaller than the sum of its proper divisors (99461628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45209220 is a wasteful number, since it uses less digits than its factorization.

45209220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107660 (or 107658 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 45209220 is about 6723.7801867699. The cubic root of 45209220 is about 356.2397177703.

Adding to 45209220 its reverse (2290254), we get a palindrome (47499474).

The spelling of 45209220 in words is "forty-five million, two hundred nine thousand, two hundred twenty".