31026222 has 24 divisors (see below), whose sum is σ = 67387320. Its totient is φ = 10316880.

The previous prime is 31026211. The next prime is 31026269. The reversal of 31026222 is 22262013.

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 = 31026195 and 31026204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6429 + ... + 10167.

It is an arithmetic number, because the mean of its divisors is an integer number (2807805).

Almost surely, 2^31026222 is an apocalyptic number.

31026222 is an abundant number, since it is smaller than the sum of its proper divisors (36361098).

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

31026222 is a wasteful number, since it uses less digits than its factorization.

31026222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4208 (or 4205 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 31026222 is about 5570.1186701901. The cubic root of 31026222 is about 314.2266137001.

Adding to 31026222 its reverse (22262013), we get a palindrome (53288235).

The spelling of 31026222 in words is "thirty-one million, twenty-six thousand, two hundred twenty-two".