31143311340 has 48 divisors (see below), whose sum is σ = 87221476608. Its totient is φ = 8302958784.

The previous prime is 31143311333. The next prime is 31143311351. The reversal of 31143311340 is 4311334113.

It is a self number, because there is not a number n which added to its sum of digits gives 31143311340.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211089 + ... + 326871.

It is an arithmetic number, because the mean of its divisors is an integer number (1817114096).

Almost surely, 2^31143311340 is an apocalyptic number.

31143311340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31143311340 is an abundant number, since it is smaller than the sum of its proper divisors (56078165268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31143311340 is a wasteful number, since it uses less digits than its factorization.

31143311340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120278 (or 120276 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31143311340 its reverse (4311334113), we get a palindrome (35454645453).

The spelling of 31143311340 in words is "thirty-one billion, one hundred forty-three million, three hundred eleven thousand, three hundred forty".