45111220 has 72 divisors (see below), whose sum is σ = 119048832. Its totient is φ = 14055360.

The previous prime is 45111203. The next prime is 45111221. The reversal of 45111220 is 2211154.

45111220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 45111194 and 45111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45111221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15609 + ... + 18271.

It is an arithmetic number, because the mean of its divisors is an integer number (1653456).

Almost surely, 2^45111220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45111220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59524416).

45111220 is an abundant number, since it is smaller than the sum of its proper divisors (73937612).

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

45111220 is a wasteful number, since it uses less digits than its factorization.

45111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701 (or 2688 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 45111220 is about 6716.4886659623. The cubic root of 45111220 is about 355.9821246758.

Adding to 45111220 its reverse (2211154), we get a palindrome (47322374).

The spelling of 45111220 in words is "forty-five million, one hundred eleven thousand, two hundred twenty".