44315991 has 20 divisors (see below), whose sum is σ = 70096752. Its totient is φ = 27805248.

The previous prime is 44315989. The next prime is 44316017. The reversal of 44315991 is 19951344.

It is a happy number.

44315991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 44315991 - 2¹ = 44315989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44315981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14715 + ... + 17468.

Almost surely, 2^44315991 is an apocalyptic number.

44315991 is a deficient number, since it is larger than the sum of its proper divisors (25780761).

44315991 is a wasteful number, since it uses less digits than its factorization.

44315991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32212 (or 32203 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 44315991 is about 6657.0256871969. The cubic root of 44315991 is about 353.8779383825.

The spelling of 44315991 in words is "forty-four million, three hundred fifteen thousand, nine hundred ninety-one".