31109016 has 16 divisors (see below), whose sum is σ = 77772600. Its totient is φ = 10369664.

The previous prime is 31109011. The next prime is 31109017. The reversal of 31109016 is 61090113.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31108983 and 31109001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31109011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648081 + ... + 648128.

Almost surely, 2^31109016 is an apocalyptic number.

It is an amenable number.

31109016 is an abundant number, since it is smaller than the sum of its proper divisors (46663584).

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

31109016 is a wasteful number, since it uses less digits than its factorization.

31109016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296218 (or 1296214 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 31109016 is about 5577.5456968097. The cubic root of 31109016 is about 314.5058717961.

Adding to 31109016 its reverse (61090113), we get a palindrome (92199129).

The spelling of 31109016 in words is "thirty-one million, one hundred nine thousand, sixteen".