31226916 has 72 divisors (see below), whose sum is σ = 88482240. Its totient is φ = 8530368.

The previous prime is 31226879. The next prime is 31226917. The reversal of 31226916 is 61962213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31226917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12370 + ... + 14678.

It is an arithmetic number, because the mean of its divisors is an integer number (1228920).

Almost surely, 2^31226916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31226916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44241120).

31226916 is an abundant number, since it is smaller than the sum of its proper divisors (57255324).

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

31226916 is a wasteful number, since it uses less digits than its factorization.

31226916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353 (or 2344 counting only the distinct ones).

The product of its digits is 3888, while the sum is 30.

The square root of 31226916 is about 5588.1048665894. The cubic root of 31226916 is about 314.9026859889.

The spelling of 31226916 in words is "thirty-one million, two hundred twenty-six thousand, nine hundred sixteen".