44139231 has 36 divisors (see below), whose sum is σ = 68094208. Its totient is φ = 27542592.

The previous prime is 44139217. The next prime is 44139233. The reversal of 44139231 is 13293144.

44139231 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 44139231 - 2⁶ = 44139167 is a prime.

It is a super-2 number, since 2×44139231² = 3896543426542722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 44139195 and 44139204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44139233) 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 35 ways as a sum of consecutive naturals, for example, 347490 + ... + 347616.

Almost surely, 2^44139231 is an apocalyptic number.

44139231 is a deficient number, since it is larger than the sum of its proper divisors (23954977).

44139231 is a wasteful number, since it uses less digits than its factorization.

44139231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 226 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 44139231 is about 6643.7362229396. The cubic root of 44139231 is about 353.4068156374.

The spelling of 44139231 in words is "forty-four million, one hundred thirty-nine thousand, two hundred thirty-one".