31440323032431 has 8 divisors (see below), whose sum is σ = 42510859311744. Its totient is φ = 20665001054040.

The previous prime is 31440323032427. The next prime is 31440323032439. The reversal of 31440323032431 is 13423032304413.

It is a happy number.

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

It is not a de Polignac number, because 31440323032431 - 2² = 31440323032427 is a prime.

It is a super-3 number, since 3×31440323032431³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 31440323032392 and 31440323032401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440323032439) 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, 73803574981 + ... + 73803575406.

It is an arithmetic number, because the mean of its divisors is an integer number (5313857413968).

Almost surely, 2^{31440323032431} is an apocalyptic number.

31440323032431 is a deficient number, since it is larger than the sum of its proper divisors (11070536279313).

31440323032431 is a wasteful number, since it uses less digits than its factorization.

31440323032431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147607150461.

The product of its (nonzero) digits is 62208, while the sum is 33.

Adding to 31440323032431 its reverse (13423032304413), we get a palindrome (44863355336844).

The spelling of 31440323032431 in words is "thirty-one trillion, four hundred forty billion, three hundred twenty-three million, thirty-two thousand, four hundred thirty-one".