31143344120 has 64 divisors (see below), whose sum is σ = 83564766720. Its totient is φ = 10213467264.

The previous prime is 31143344083. The next prime is 31143344147. The reversal of 31143344120 is 2144334113.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31143344120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2411522 + ... + 2424401.

It is an arithmetic number, because the mean of its divisors is an integer number (1305699480).

Almost surely, 2^31143344120 is an apocalyptic number.

It is an amenable number.

31143344120 is an abundant number, since it is smaller than the sum of its proper divisors (52421422600).

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

31143344120 is a wasteful number, since it uses less digits than its factorization.

31143344120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4835964 (or 4835960 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 31143344120 its reverse (2144334113), we get a palindrome (33287678233).

It can be divided in two parts, 311433 and 44120, that added together give a palindrome (355553).

The spelling of 31143344120 in words is "thirty-one billion, one hundred forty-three million, three hundred forty-four thousand, one hundred twenty".