31400000431 has 2 divisors, whose sum is σ = 31400000432. Its totient is φ = 31400000430.

The previous prime is 31400000413. The next prime is 31400000447. The reversal of 31400000431 is 13400000413.

Together with previous prime (31400000413) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (31400000447) can be obtained adding 31400000431 to its sum of digits (16).

It is a strong prime.

It is an emirp because it is prime and its reverse (13400000413) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31400000431 is a prime.

It is a super-2 number, since 2×31400000431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31400001431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700000215 + 15700000216.

It is an arithmetic number, because the mean of its divisors is an integer number (15700000216).

Almost surely, 2^31400000431 is an apocalyptic number.

31400000431 is a deficient number, since it is larger than the sum of its proper divisors (1).

31400000431 is an equidigital number, since it uses as much as digits as its factorization.

31400000431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31400000431 its reverse (13400000413), we get a palindrome (44800000844).

The spelling of 31400000431 in words is "thirty-one billion, four hundred million, four hundred thirty-one", and thus it is an aban number.