45213220 has 24 divisors (see below), whose sum is σ = 102252024. Its totient is φ = 16694016.

The previous prime is 45213199. The next prime is 45213227. The reversal of 45213220 is 2231254.

It can be written as a sum of positive squares in 4 ways, for example, as 8538084 + 36675136 = 2922^2 + 6056^2 .

It is not an unprimeable number, because it can be changed into a prime (45213227) 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, 86689 + ... + 87208.

It is an arithmetic number, because the mean of its divisors is an integer number (4260501).

Almost surely, 2^45213220 is an apocalyptic number.

It is an amenable number.

45213220 is an abundant number, since it is smaller than the sum of its proper divisors (57038804).

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

45213220 is a wasteful number, since it uses less digits than its factorization.

45213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173919 (or 173917 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 45213220 is about 6724.0776319135. The cubic root of 45213220 is about 356.2502238636.

Adding to 45213220 its reverse (2231254), we get a palindrome (47444474).

The spelling of 45213220 in words is "forty-five million, two hundred thirteen thousand, two hundred twenty".