33131222 has 4 divisors (see below), whose sum is σ = 49696836. Its totient is φ = 16565610.

The previous prime is 33131221. The next prime is 33131233. The reversal of 33131222 is 22213133.

33131222 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 33131222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33131221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8282804 + ... + 8282807.

It is an arithmetic number, because the mean of its divisors is an integer number (12424209).

Almost surely, 2^33131222 is an apocalyptic number.

33131222 is a deficient number, since it is larger than the sum of its proper divisors (16565614).

33131222 is a wasteful number, since it uses less digits than its factorization.

33131222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16565613.

The product of its digits is 216, while the sum is 17.

The square root of 33131222 is about 5755.9727240493. The cubic root of 33131222 is about 321.1780212904.

Adding to 33131222 its reverse (22213133), we get a palindrome (55344355).

The spelling of 33131222 in words is "thirty-three million, one hundred thirty-one thousand, two hundred twenty-two".