45312220 has 12 divisors (see below), whose sum is σ = 95155704. Its totient is φ = 18124880.

The previous prime is 45312199. The next prime is 45312221. The reversal of 45312220 is 2221354.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45312221) 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, 1132786 + ... + 1132825.

It is an arithmetic number, because the mean of its divisors is an integer number (7929642).

Almost surely, 2^45312220 is an apocalyptic number.

It is an amenable number.

45312220 is an abundant number, since it is smaller than the sum of its proper divisors (49843484).

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

45312220 is a wasteful number, since it uses less digits than its factorization.

45312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265620 (or 2265618 counting only the distinct ones).

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

The square root of 45312220 is about 6731.4352110081. The cubic root of 45312220 is about 356.5100524538.

Adding to 45312220 its reverse (2221354), we get a palindrome (47533574).

The spelling of 45312220 in words is "forty-five million, three hundred twelve thousand, two hundred twenty".