45221999 has 2 divisors, whose sum is σ = 45222000. Its totient is φ = 45221998.

The previous prime is 45221983. The next prime is 45222007. The reversal of 45221999 is 99912254.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45221999 - 2⁴ = 45221983 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45221299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22610999 + 22611000.

It is an arithmetic number, because the mean of its divisors is an integer number (22611000).

Almost surely, 2^45221999 is an apocalyptic number.

45221999 is a deficient number, since it is larger than the sum of its proper divisors (1).

45221999 is an equidigital number, since it uses as much as digits as its factorization.

45221999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 41.

The square root of 45221999 is about 6724.7304035180. The cubic root of 45221999 is about 356.2732799397.

The spelling of 45221999 in words is "forty-five million, two hundred twenty-one thousand, nine hundred ninety-nine".