2531222 has 4 divisors (see below), whose sum is σ = 3796836. Its totient is φ = 1265610.

The previous prime is 2531209. The next prime is 2531233. The reversal of 2531222 is 2221352.

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 2531222.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 632804 + ... + 632807.

It is an arithmetic number, because the mean of its divisors is an integer number (949209).

2^2531222 is an apocalyptic number.

2531222 is a deficient number, since it is larger than the sum of its proper divisors (1265614).

2531222 is a wasteful number, since it uses less digits than its factorization.

2531222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265613.

The product of its digits is 240, while the sum is 17.

The square root of 2531222 is about 1590.9814580943. The cubic root of 2531222 is about 136.2835419482.

Adding to 2531222 its reverse (2221352), we get a palindrome (4752574).

The spelling of 2531222 in words is "two million, five hundred thirty-one thousand, two hundred twenty-two".