31344400231 has 2 divisors, whose sum is σ = 31344400232. Its totient is φ = 31344400230.

The previous prime is 31344400201. The next prime is 31344400309. The reversal of 31344400231 is 13200444313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31344400231 - 2¹⁵ = 31344367463 is a prime.

It is a super-2 number, since 2×31344400231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31344400196 and 31344400205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31344400201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15672200115 + 15672200116.

It is an arithmetic number, because the mean of its divisors is an integer number (15672200116).

Almost surely, 2^31344400231 is an apocalyptic number.

31344400231 is a deficient number, since it is larger than the sum of its proper divisors (1).

31344400231 is an equidigital number, since it uses as much as digits as its factorization.

31344400231 is an odious number, because the sum of its binary digits is odd.

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

Adding to 31344400231 its reverse (13200444313), we get a palindrome (44544844544).

The spelling of 31344400231 in words is "thirty-one billion, three hundred forty-four million, four hundred thousand, two hundred thirty-one".