45731220 has 24 divisors (see below), whose sum is σ = 128047584. Its totient is φ = 12194976.

The previous prime is 45731201. The next prime is 45731221. The reversal of 45731220 is 2213754.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45731221) 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, 381034 + ... + 381153.

It is an arithmetic number, because the mean of its divisors is an integer number (5335316).

Almost surely, 2^45731220 is an apocalyptic number.

It is an amenable number.

45731220 is an abundant number, since it is smaller than the sum of its proper divisors (82316364).

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

45731220 is a wasteful number, since it uses less digits than its factorization.

45731220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762199 (or 762197 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 45731220 is about 6762.4862291912. The cubic root of 45731220 is about 357.6055599734.

Adding to 45731220 its reverse (2213754), we get a palindrome (47944974).

The spelling of 45731220 in words is "forty-five million, seven hundred thirty-one thousand, two hundred twenty".