45521999 has 2 divisors, whose sum is σ = 45522000. Its totient is φ = 45521998.

The previous prime is 45521989. The next prime is 45522017. The reversal of 45521999 is 99912554.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45521999 - 2²⁰ = 44473423 is a 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 (45521969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22760999 + 22761000.

It is an arithmetic number, because the mean of its divisors is an integer number (22761000).

Almost surely, 2^45521999 is an apocalyptic number.

45521999 is a deficient number, since it is larger than the sum of its proper divisors (1).

45521999 is an equidigital number, since it uses as much as digits as its factorization.

45521999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 44.

The square root of 45521999 is about 6746.9992589299. Note that the first 3 decimals coincide. The cubic root of 45521999 is about 357.0593759699.

The spelling of 45521999 in words is "forty-five million, five hundred twenty-one thousand, nine hundred ninety-nine".