44521891 has 2 divisors, whose sum is σ = 44521892. Its totient is φ = 44521890.

The previous prime is 44521879. The next prime is 44521901. The reversal of 44521891 is 19812544.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 44521891 - 2²³ = 36133283 is a prime.

It is not a weakly prime, because it can be changed into another prime (44521801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22260945 + 22260946.

It is an arithmetic number, because the mean of its divisors is an integer number (22260946).

Almost surely, 2^44521891 is an apocalyptic number.

44521891 is a deficient number, since it is larger than the sum of its proper divisors (1).

44521891 is an equidigital number, since it uses as much as digits as its factorization.

44521891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 34.

The square root of 44521891 is about 6672.4726301424. The cubic root of 44521891 is about 354.4251517826.

The spelling of 44521891 in words is "forty-four million, five hundred twenty-one thousand, eight hundred ninety-one".