45568921 has 4 divisors (see below), whose sum is σ = 45737344. Its totient is φ = 45400500.

The previous prime is 45568903. The next prime is 45568937. The reversal of 45568921 is 12986554.

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 a cyclic number.

It is not a de Polignac number, because 45568921 - 2¹⁹ = 45044633 is a prime.

It is a super-2 number, since 2×45568921² = 4153053122208482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45568961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83805 + ... + 84346.

It is an arithmetic number, because the mean of its divisors is an integer number (11434336).

Almost surely, 2^45568921 is an apocalyptic number.

It is an amenable number.

45568921 is a deficient number, since it is larger than the sum of its proper divisors (168423).

45568921 is a wasteful number, since it uses less digits than its factorization.

45568921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168422.

The product of its digits is 86400, while the sum is 40.

The square root of 45568921 is about 6750.4756128735. The cubic root of 45568921 is about 357.1820140153.

The spelling of 45568921 in words is "forty-five million, five hundred sixty-eight thousand, nine hundred twenty-one".