45223421 has 2 divisors, whose sum is σ = 45223422. Its totient is φ = 45223420.

The previous prime is 45223397. The next prime is 45223429. The reversal of 45223421 is 12432254.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42758521 + 2464900 = 6539^2 + 1570^2 .

It is a cyclic number.

It is not a de Polignac number, because 45223421 - 2⁶ = 45223357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45223429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22611710 + 22611711.

It is an arithmetic number, because the mean of its divisors is an integer number (22611711).

Almost surely, 2^45223421 is an apocalyptic number.

It is an amenable number.

45223421 is a deficient number, since it is larger than the sum of its proper divisors (1).

45223421 is an equidigital number, since it uses as much as digits as its factorization.

45223421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 23.

The square root of 45223421 is about 6724.8361318325. The cubic root of 45223421 is about 356.2770142231.

Adding to 45223421 its reverse (12432254), we get a palindrome (57655675).

The spelling of 45223421 in words is "forty-five million, two hundred twenty-three thousand, four hundred twenty-one".