45521321 has 8 divisors (see below), whose sum is σ = 48285600. Its totient is φ = 42793920.

The previous prime is 45521309. The next prime is 45521323. The reversal of 45521321 is 12312554.

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 45521321 - 2¹⁰ = 45520297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45521323) 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, 6656 + ... + 11633.

It is an arithmetic number, because the mean of its divisors is an integer number (6035700).

Almost surely, 2^45521321 is an apocalyptic number.

It is an amenable number.

45521321 is a deficient number, since it is larger than the sum of its proper divisors (2764279).

45521321 is a wasteful number, since it uses less digits than its factorization.

45521321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18439.

The product of its digits is 1200, while the sum is 23.

The square root of 45521321 is about 6746.9490141841. The cubic root of 45521321 is about 357.0576032925.

Adding to 45521321 its reverse (12312554), we get a palindrome (57833875).

The spelling of 45521321 in words is "forty-five million, five hundred twenty-one thousand, three hundred twenty-one".