44501981 has 2 divisors, whose sum is σ = 44501982. Its totient is φ = 44501980.

The previous prime is 44501929. The next prime is 44502011. The reversal of 44501981 is 18910544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37027225 + 7474756 = 6085^2 + 2734^2 .

It is a cyclic number.

It is not a de Polignac number, because 44501981 - 2²² = 40307677 is a prime.

It is a super-2 number, since 2×44501981² = 3960852625848722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44501081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22250990 + 22250991.

It is an arithmetic number, because the mean of its divisors is an integer number (22250991).

Almost surely, 2^44501981 is an apocalyptic number.

It is an amenable number.

44501981 is a deficient number, since it is larger than the sum of its proper divisors (1).

44501981 is an equidigital number, since it uses as much as digits as its factorization.

44501981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 44501981 is about 6670.9805126383. The cubic root of 44501981 is about 354.3723114325.

The spelling of 44501981 in words is "forty-four million, five hundred one thousand, nine hundred eighty-one".