31312430431 has 8 divisors (see below), whose sum is σ = 32324617728. Its totient is φ = 30300375000.

The previous prime is 31312430423. The next prime is 31312430453. The reversal of 31312430431 is 13403421313.

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 31312430431 - 2³ = 31312430423 is a prime.

It is a super-2 number, since 2×31312430431² (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 = 31312430396 and 31312430405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312430531) 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, 730956 + ... + 772606.

It is an arithmetic number, because the mean of its divisors is an integer number (4040577216).

Almost surely, 2^31312430431 is an apocalyptic number.

31312430431 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31312430431 is a deficient number, since it is larger than the sum of its proper divisors (1012187297).

31312430431 is a wasteful number, since it uses less digits than its factorization.

31312430431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65933.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31312430431 its reverse (13403421313), we get a palindrome (44715851744).

The spelling of 31312430431 in words is "thirty-one billion, three hundred twelve million, four hundred thirty thousand, four hundred thirty-one".