31331201311343 has 2 divisors, whose sum is σ = 31331201311344. Its totient is φ = 31331201311342.

The previous prime is 31331201311313. The next prime is 31331201311357. The reversal of 31331201311343 is 34311310213313.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31331201311343 - 2⁶ = 31331201311279 is a prime.

It is a super-2 number, since 2×31331201311343² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31331201311313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15665600655671 + 15665600655672.

It is an arithmetic number, because the mean of its divisors is an integer number (15665600655672).

Almost surely, 2^{31331201311343} is an apocalyptic number.

31331201311343 is a deficient number, since it is larger than the sum of its proper divisors (1).

31331201311343 is an equidigital number, since it uses as much as digits as its factorization.

31331201311343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 29.

Adding to 31331201311343 its reverse (34311310213313), we get a palindrome (65642511524656).

The spelling of 31331201311343 in words is "thirty-one trillion, three hundred thirty-one billion, two hundred one million, three hundred eleven thousand, three hundred forty-three".