31311300440343 has 16 divisors (see below), whose sum is σ = 52049953979136. Its totient is φ = 16265610618240.

The previous prime is 31311300440339. The next prime is 31311300440351. The reversal of 31311300440343 is 34304400311313.

It is not a de Polignac number, because 31311300440343 - 2² = 31311300440339 is a prime.

It is a super-3 number, since 3×31311300440343³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31311300440343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311300440243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67773377346 + ... + 67773377807.

It is an arithmetic number, because the mean of its divisors is an integer number (3253122123696).

Almost surely, 2^{31311300440343} is an apocalyptic number.

31311300440343 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

31311300440343 is a deficient number, since it is larger than the sum of its proper divisors (20738653538793).

31311300440343 is a wasteful number, since it uses less digits than its factorization.

31311300440343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135546755174.

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 31311300440343 its reverse (34304400311313), we get a palindrome (65615700751656).

The spelling of 31311300440343 in words is "thirty-one trillion, three hundred eleven billion, three hundred million, four hundred forty thousand, three hundred forty-three".