45220891 has 2 divisors, whose sum is σ = 45220892. Its totient is φ = 45220890.

The previous prime is 45220883. The next prime is 45220937. The reversal of 45220891 is 19802254.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45220891 - 2³ = 45220883 is a prime.

It is not a weakly prime, because it can be changed into another prime (45220801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22610445 + 22610446.

It is an arithmetic number, because the mean of its divisors is an integer number (22610446).

Almost surely, 2^45220891 is an apocalyptic number.

45220891 is a deficient number, since it is larger than the sum of its proper divisors (1).

45220891 is an equidigital number, since it uses as much as digits as its factorization.

45220891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 45220891 is about 6724.6480205287. The cubic root of 45220891 is about 356.2703701905.

The spelling of 45220891 in words is "forty-five million, two hundred twenty thousand, eight hundred ninety-one".