31440302431 has 8 divisors (see below), whose sum is σ = 31886157600. Its totient is φ = 30994531680.

The previous prime is 31440302417. The next prime is 31440302437. The reversal of 31440302431 is 13420304413.

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 31440302431 - 2¹⁹ = 31439778143 is a prime.

It is a super-2 number, since 2×31440302431² (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 = 31440302396 and 31440302405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440302437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1411005 + ... + 1433113.

It is an arithmetic number, because the mean of its divisors is an integer number (3985769700).

Almost surely, 2^31440302431 is an apocalyptic number.

31440302431 is a deficient number, since it is larger than the sum of its proper divisors (445855169).

31440302431 is a wasteful number, since it uses less digits than its factorization.

31440302431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42209.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31440302431 its reverse (13420304413), we get a palindrome (44860606844).

The spelling of 31440302431 in words is "thirty-one billion, four hundred forty million, three hundred two thousand, four hundred thirty-one".