31109022 has 60 divisors (see below), whose sum is σ = 81108720. Its totient is φ = 8886024.

The previous prime is 31109017. The next prime is 31109047. The reversal of 31109022 is 22090113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31108986 and 31109004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 5979 + ... + 9897.

It is an arithmetic number, because the mean of its divisors is an integer number (1351812).

Almost surely, 2^31109022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31109022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40554360).

31109022 is an abundant number, since it is smaller than the sum of its proper divisors (49999698).

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

31109022 is a wasteful number, since it uses less digits than its factorization.

31109022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947 (or 3931 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 31109022 is about 5577.5462346806. The cubic root of 31109022 is about 314.5058920157.

Adding to 31109022 its reverse (22090113), we get a palindrome (53199135).

The spelling of 31109022 in words is "thirty-one million, one hundred nine thousand, twenty-two".