45423221 has 2 divisors, whose sum is σ = 45423222. Its totient is φ = 45423220.

The previous prime is 45423199. The next prime is 45423227. The reversal of 45423221 is 12232454.

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., 45292900 + 130321 = 6730^2 + 361^2 .

It is a cyclic number.

It is not a de Polignac number, because 45423221 - 2¹⁰ = 45422197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45423227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22711610 + 22711611.

It is an arithmetic number, because the mean of its divisors is an integer number (22711611).

Almost surely, 2^45423221 is an apocalyptic number.

It is an amenable number.

45423221 is a deficient number, since it is larger than the sum of its proper divisors (1).

45423221 is an equidigital number, since it uses as much as digits as its factorization.

45423221 is an evil number, because the sum of its binary digits is even.

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

The square root of 45423221 is about 6739.6751405390. The cubic root of 45423221 is about 356.8009283836.

Adding to 45423221 its reverse (12232454), we get a palindrome (57655675).

The spelling of 45423221 in words is "forty-five million, four hundred twenty-three thousand, two hundred twenty-one".