45251521 has 8 divisors (see below), whose sum is σ = 54438080. Its totient is φ = 36745488.

The previous prime is 45251519. The next prime is 45251533. The reversal of 45251521 is 12515254.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45251521 - 2¹ = 45251519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45251221) 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, 169986 + ... + 170251.

It is an arithmetic number, because the mean of its divisors is an integer number (6804760).

Almost surely, 2^45251521 is an apocalyptic number.

It is an amenable number.

45251521 is a deficient number, since it is larger than the sum of its proper divisors (9186559).

45251521 is a wasteful number, since it uses less digits than its factorization.

45251521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340263.

The product of its digits is 2000, while the sum is 25.

The square root of 45251521 is about 6726.9250776265. The cubic root of 45251521 is about 356.3507909745.

Adding to 45251521 its reverse (12515254), we get a palindrome (57766775).

It can be divided in two parts, 4 and 5251521, that added together give a palindrome (5251525).

The spelling of 45251521 in words is "forty-five million, two hundred fifty-one thousand, five hundred twenty-one".