31213110311343 has 24 divisors (see below), whose sum is σ = 46640719073520. Its totient is φ = 20091008206080.

The previous prime is 31213110311321. The next prime is 31213110311359. The reversal of 31213110311343 is 34311301131213.

31213110311343 is a `hidden beast` number, since 3 + 1 + 2 + 1 + 3 + 1 + 1 + 0 + 311 + 343 = 666.

It is not a de Polignac number, because 31213110311343 - 2⁸ = 31213110311087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213110311843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30469788 + ... + 31477518.

It is an arithmetic number, because the mean of its divisors is an integer number (1943363294730).

Almost surely, 2^{31213110311343} is an apocalyptic number.

31213110311343 is a deficient number, since it is larger than the sum of its proper divisors (15427608762177).

31213110311343 is a wasteful number, since it uses less digits than its factorization.

31213110311343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126439 (or 1126436 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

Adding to 31213110311343 its reverse (34311301131213), we get a palindrome (65524411442556).

The spelling of 31213110311343 in words is "thirty-one trillion, two hundred thirteen billion, one hundred ten million, three hundred eleven thousand, three hundred forty-three".