45072191 has 2 divisors, whose sum is σ = 45072192. Its totient is φ = 45072190.

The previous prime is 45072187. The next prime is 45072211. The reversal of 45072191 is 19127054.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45072191 - 2² = 45072187 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 (45072121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22536095 + 22536096.

It is an arithmetic number, because the mean of its divisors is an integer number (22536096).

Almost surely, 2^45072191 is an apocalyptic number.

45072191 is a deficient number, since it is larger than the sum of its proper divisors (1).

45072191 is an equidigital number, since it uses as much as digits as its factorization.

45072191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 45072191 is about 6713.5825756447. The cubic root of 45072191 is about 355.8794330390.

The spelling of 45072191 in words is "forty-five million, seventy-two thousand, one hundred ninety-one".