45022521 has 4 divisors (see below), whose sum is σ = 60030032. Its totient is φ = 30015012.

The previous prime is 45022513. The next prime is 45022543. The reversal of 45022521 is 12522054.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 45022521 - 2³ = 45022513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45022321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7503751 + ... + 7503756.

It is an arithmetic number, because the mean of its divisors is an integer number (15007508).

Almost surely, 2^45022521 is an apocalyptic number.

It is an amenable number.

45022521 is a deficient number, since it is larger than the sum of its proper divisors (15007511).

45022521 is a wasteful number, since it uses less digits than its factorization.

45022521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15007510.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 45022521 is about 6709.8823387597. The cubic root of 45022521 is about 355.7486574376.

Adding to 45022521 its reverse (12522054), we get a palindrome (57544575).

The spelling of 45022521 in words is "forty-five million, twenty-two thousand, five hundred twenty-one".