44142981 has 4 divisors (see below), whose sum is σ = 58857312. Its totient is φ = 29428652.

The previous prime is 44142979. The next prime is 44143009. The reversal of 44142981 is 18924144.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 44142981 - 2¹ = 44142979 is a prime.

It is a super-2 number, since 2×44142981² = 3897205543132722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44140981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7357161 + ... + 7357166.

It is an arithmetic number, because the mean of its divisors is an integer number (14714328).

Almost surely, 2^44142981 is an apocalyptic number.

It is an amenable number.

44142981 is a deficient number, since it is larger than the sum of its proper divisors (14714331).

44142981 is a wasteful number, since it uses less digits than its factorization.

44142981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14714330.

The product of its digits is 9216, while the sum is 33.

The square root of 44142981 is about 6644.0184376626. The cubic root of 44142981 is about 353.4168236506.

The spelling of 44142981 in words is "forty-four million, one hundred forty-two thousand, nine hundred eighty-one".