45231320 has 16 divisors (see below), whose sum is σ = 101770560. Its totient is φ = 18092512.

The previous prime is 45231299. The next prime is 45231337. The reversal of 45231320 is 2313254.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 45231292 and 45231301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565352 + ... + 565431.

It is an arithmetic number, because the mean of its divisors is an integer number (6360660).

Almost surely, 2^45231320 is an apocalyptic number.

45231320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45231320 is an abundant number, since it is smaller than the sum of its proper divisors (56539240).

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

45231320 is a wasteful number, since it uses less digits than its factorization.

45231320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130794 (or 1130790 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 45231320 is about 6725.4234067455. The cubic root of 45231320 is about 356.2977561915.

Adding to 45231320 its reverse (2313254), we get a palindrome (47544574).

The spelling of 45231320 in words is "forty-five million, two hundred thirty-one thousand, three hundred twenty".