45751321 has 16 divisors (see below), whose sum is σ = 57231360. Its totient is φ = 35531280.

The previous prime is 45751313. The next prime is 45751361. The reversal of 45751321 is 12315754.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 45751321 - 2³ = 45751313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45751321.

It is not an unprimeable number, because it can be changed into a prime (45751361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27450 + ... + 29068.

It is an arithmetic number, because the mean of its divisors is an integer number (3576960).

Almost surely, 2^45751321 is an apocalyptic number.

It is an amenable number.

45751321 is a deficient number, since it is larger than the sum of its proper divisors (11480039).

45751321 is a wasteful number, since it uses less digits than its factorization.

45751321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004.

The product of its digits is 4200, while the sum is 28.

The square root of 45751321 is about 6763.9722796593. The cubic root of 45751321 is about 357.6579470621.

The spelling of 45751321 in words is "forty-five million, seven hundred fifty-one thousand, three hundred twenty-one".