31440244423 has 16 divisors (see below), whose sum is σ = 37698856960. Its totient is φ = 25651922400.

The previous prime is 31440244417. The next prime is 31440244481. The reversal of 31440244423 is 32444204413.

It is a cyclic number.

It is not a de Polignac number, because 31440244423 - 2⁵ = 31440244391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440244403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1174353 + ... + 1200826.

It is an arithmetic number, because the mean of its divisors is an integer number (2356178560).

Almost surely, 2^31440244423 is an apocalyptic number.

31440244423 is a deficient number, since it is larger than the sum of its proper divisors (6258612537).

31440244423 is a wasteful number, since it uses less digits than its factorization.

31440244423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375278.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 31440244423 its reverse (32444204413), we get a palindrome (63884448836).

The spelling of 31440244423 in words is "thirty-one billion, four hundred forty million, two hundred forty-four thousand, four hundred twenty-three".