31144443431 has 8 divisors (see below), whose sum is σ = 31273866624. Its totient is φ = 31015104120.

The previous prime is 31144443409. The next prime is 31144443437. The reversal of 31144443431 is 13434444113.

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 31144443431 - 2¹⁸ = 31144181287 is a prime.

It is a super-2 number, since 2×31144443431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144443437) 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, 787316 + ... + 825926.

It is an arithmetic number, because the mean of its divisors is an integer number (3909233328).

Almost surely, 2^31144443431 is an apocalyptic number.

31144443431 is a deficient number, since it is larger than the sum of its proper divisors (129423193).

31144443431 is a wasteful number, since it uses less digits than its factorization.

31144443431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41941.

The product of its digits is 27648, while the sum is 32.

Adding to 31144443431 its reverse (13434444113), we get a palindrome (44578887544).

The spelling of 31144443431 in words is "thirty-one billion, one hundred forty-four million, four hundred forty-three thousand, four hundred thirty-one".