45223021 has 8 divisors (see below), whose sum is σ = 48384800. Its totient is φ = 42139440.

The previous prime is 45223019. The next prime is 45223039. The reversal of 45223021 is 12032254.

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 45223021 - 2¹ = 45223019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 45223021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45223001) 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, 18351 + ... + 20668.

It is an arithmetic number, because the mean of its divisors is an integer number (6048100).

Almost surely, 2^45223021 is an apocalyptic number.

It is an amenable number.

45223021 is a deficient number, since it is larger than the sum of its proper divisors (3161779).

45223021 is a wasteful number, since it uses less digits than its factorization.

45223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39099.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 45223021 is about 6724.8063912651. The cubic root of 45223021 is about 356.2759637997.

Adding to 45223021 its reverse (12032254), we get a palindrome (57255275).

The spelling of 45223021 in words is "forty-five million, two hundred twenty-three thousand, twenty-one".