44315981 has 2 divisors, whose sum is σ = 44315982. Its totient is φ = 44315980.

The previous prime is 44315977. The next prime is 44315983. The reversal of 44315981 is 18951344.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32959081 + 11356900 = 5741^2 + 3370^2 .

It is a cyclic number.

It is not a de Polignac number, because 44315981 - 2² = 44315977 is a prime.

It is a super-2 number, since 2×44315981² = 3927812343984722, which contains 22 as substring.

Together with 44315983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44315983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22157990 + 22157991.

It is an arithmetic number, because the mean of its divisors is an integer number (22157991).

Almost surely, 2^44315981 is an apocalyptic number.

It is an amenable number.

44315981 is a deficient number, since it is larger than the sum of its proper divisors (1).

44315981 is an equidigital number, since it uses as much as digits as its factorization.

44315981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 44315981 is about 6657.0249361107. The cubic root of 44315981 is about 353.8779117648.

The spelling of 44315981 in words is "forty-four million, three hundred fifteen thousand, nine hundred eighty-one".