31144004120 has 16 divisors (see below), whose sum is σ = 70074009360. Its totient is φ = 12457601632.

The previous prime is 31144004119. The next prime is 31144004141. The reversal of 31144004120 is 2140044113.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31144004092 and 31144004101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389300012 + ... + 389300091.

It is an arithmetic number, because the mean of its divisors is an integer number (4379625585).

Almost surely, 2^31144004120 is an apocalyptic number.

It is an amenable number.

31144004120 is an abundant number, since it is smaller than the sum of its proper divisors (38930005240).

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

31144004120 is a wasteful number, since it uses less digits than its factorization.

31144004120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778600114 (or 778600110 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 31144004120 its reverse (2140044113), we get a palindrome (33284048233).

The spelling of 31144004120 in words is "thirty-one billion, one hundred forty-four million, four thousand, one hundred twenty".