31378100052 has 48 divisors (see below), whose sum is σ = 78864222080. Its totient is φ = 9652756608.

The previous prime is 31378099967. The next prime is 31378100077. The reversal of 31378100052 is 25000187313.

It is a junction number, because it is equal to n+sod(n) for n = 31378099992 and 31378100019.

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, 825849 + ... + 863007.

Almost surely, 2^31378100052 is an apocalyptic number.

It is an amenable number.

31378100052 is an abundant number, since it is smaller than the sum of its proper divisors (47486122028).

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

31378100052 is a wasteful number, since it uses less digits than its factorization.

31378100052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42592 (or 42590 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

Adding to 31378100052 its reverse (25000187313), we get a palindrome (56378287365).

The spelling of 31378100052 in words is "thirty-one billion, three hundred seventy-eight million, one hundred thousand, fifty-two".