31102116 has 12 divisors (see below), whose sum is σ = 72571632. Its totient is φ = 10367368.

The previous prime is 31102087. The next prime is 31102121. The reversal of 31102116 is 61120113.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 31102095 and 31102104.

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, 1295910 + ... + 1295933.

It is an arithmetic number, because the mean of its divisors is an integer number (6047636).

Almost surely, 2^31102116 is an apocalyptic number.

It is an amenable number.

31102116 is an abundant number, since it is smaller than the sum of its proper divisors (41469516).

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

31102116 is a wasteful number, since it uses less digits than its factorization.

31102116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591850 (or 2591848 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 31102116 is about 5576.9271108739. The cubic root of 31102116 is about 314.4826175411.

Adding to 31102116 its reverse (61120113), we get a palindrome (92222229).

The spelling of 31102116 in words is "thirty-one million, one hundred two thousand, one hundred sixteen".