45223321221 has 16 divisors (see below), whose sum is σ = 72151168320. Its totient is φ = 27829735920.

The previous prime is 45223321193. The next prime is 45223321237. The reversal of 45223321221 is 12212332254.

It is not a de Polignac number, because 45223321221 - 2²³ = 45214932613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45223321261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64420335 + ... + 64421036.

It is an arithmetic number, because the mean of its divisors is an integer number (4509448020).

Almost surely, 2^45223321221 is an apocalyptic number.

It is an amenable number.

45223321221 is a deficient number, since it is larger than the sum of its proper divisors (26927847099).

45223321221 is a wasteful number, since it uses less digits than its factorization.

45223321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128841393 (or 128841387 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

Adding to 45223321221 its reverse (12212332254), we get a palindrome (57435653475).

The spelling of 45223321221 in words is "forty-five billion, two hundred twenty-three million, three hundred twenty-one thousand, two hundred twenty-one".