31444221431 has 8 divisors (see below), whose sum is σ = 35951984640. Its totient is φ = 26940391128.

The previous prime is 31444221397. The next prime is 31444221467. The reversal of 31444221431 is 13412244413.

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

It is not a de Polignac number, because 31444221431 - 2²⁶ = 31377112567 is a prime.

It is a super-2 number, since 2×31444221431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31444221394 and 31444221403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31444221131) 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, 966071 + ... + 998088.

It is an arithmetic number, because the mean of its divisors is an integer number (4493998080).

Almost surely, 2^31444221431 is an apocalyptic number.

31444221431 is a deficient number, since it is larger than the sum of its proper divisors (4507763209).

31444221431 is a wasteful number, since it uses less digits than its factorization.

31444221431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966453.

The product of its digits is 9216, while the sum is 29.

Adding to 31444221431 its reverse (13412244413), we get a palindrome (44856465844).

The spelling of 31444221431 in words is "thirty-one billion, four hundred forty-four million, two hundred twenty-one thousand, four hundred thirty-one".