31204144441 has 4 divisors (see below), whose sum is σ = 31230433872. Its totient is φ = 31177855012.

The previous prime is 31204144403. The next prime is 31204144451. The reversal of 31204144441 is 14444140213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14444140213 = 103 ⋅140234371.

It is a cyclic number.

It is not a de Polignac number, because 31204144441 - 2⁷ = 31204144313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31204144451) 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, 13142935 + ... + 13145308.

It is an arithmetic number, because the mean of its divisors is an integer number (7807608468).

Almost surely, 2^31204144441 is an apocalyptic number.

It is an amenable number.

31204144441 is a deficient number, since it is larger than the sum of its proper divisors (26289431).

31204144441 is a wasteful number, since it uses less digits than its factorization.

31204144441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26289430.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 31204144441 its reverse (14444140213), we get a palindrome (45648284654).

The spelling of 31204144441 in words is "thirty-one billion, two hundred four million, one hundred forty-four thousand, four hundred forty-one".