31106222 has 16 divisors (see below), whose sum is σ = 53434080. Its totient is φ = 13303968.

The previous prime is 31106221. The next prime is 31106227. The reversal of 31106222 is 22260113.

It is a super-2 number, since 2×31106222² = 1935194094226568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31106222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31106221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5804 + ... + 9792.

It is an arithmetic number, because the mean of its divisors is an integer number (3339630).

Almost surely, 2^31106222 is an apocalyptic number.

31106222 is a deficient number, since it is larger than the sum of its proper divisors (22327858).

31106222 is a wasteful number, since it uses less digits than its factorization.

31106222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4555.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 31106222 is about 5577.2952225967. The cubic root of 31106222 is about 314.4964559222.

Adding to 31106222 its reverse (22260113), we get a palindrome (53366335).

The spelling of 31106222 in words is "thirty-one million, one hundred six thousand, two hundred twenty-two".