44931981 has 8 divisors (see below), whose sum is σ = 60924960. Its totient is φ = 29446832.

The previous prime is 44931973. The next prime is 44932001. The reversal of 44931981 is 18913944.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 44931981 - 2³ = 44931973 is a prime.

It is a super-2 number, since 2×44931981² = 4037765833168722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44931911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126750 + ... + 127103.

It is an arithmetic number, because the mean of its divisors is an integer number (7615620).

Almost surely, 2^44931981 is an apocalyptic number.

It is an amenable number.

44931981 is a deficient number, since it is larger than the sum of its proper divisors (15992979).

44931981 is a wasteful number, since it uses less digits than its factorization.

44931981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253915.

The product of its digits is 31104, while the sum is 39.

The square root of 44931981 is about 6703.1321783178. The cubic root of 44931981 is about 355.5100279850.

The spelling of 44931981 in words is "forty-four million, nine hundred thirty-one thousand, nine hundred eighty-one".