45501220 has 24 divisors (see below), whose sum is σ = 95679864. Its totient is φ = 18176256.

The previous prime is 45501193. The next prime is 45501221. The reversal of 45501220 is 2210554.

It can be written as a sum of positive squares in 4 ways, for example, as 13147876 + 32353344 = 3626^2 + 5688^2 .

It is a super-2 number, since 2×45501220² = 4140722042976800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45501221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26632 + ... + 28288.

It is an arithmetic number, because the mean of its divisors is an integer number (3986661).

Almost surely, 2^45501220 is an apocalyptic number.

It is an amenable number.

45501220 is an abundant number, since it is smaller than the sum of its proper divisors (50178644).

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

45501220 is a wasteful number, since it uses less digits than its factorization.

45501220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039 (or 3037 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 45501220 is about 6745.4592134265. The cubic root of 45501220 is about 357.0050398533.

Adding to 45501220 its reverse (2210554), we get a palindrome (47711774).

The spelling of 45501220 in words is "forty-five million, five hundred one thousand, two hundred twenty".