222231131 has 4 divisors (see below), whose sum is σ = 224728200. Its totient is φ = 219734064.

The previous prime is 222231109. The next prime is 222231137. The reversal of 222231131 is 131132222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222231131 is a prime.

It is a super-2 number, since 2×222231131² = 98773351171078322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222231137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1248401 + ... + 1248578.

It is an arithmetic number, because the mean of its divisors is an integer number (56182050).

Almost surely, 2^222231131 is an apocalyptic number.

222231131 is a deficient number, since it is larger than the sum of its proper divisors (2497069).

222231131 is an equidigital number, since it uses as much as digits as its factorization.

222231131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497068.

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

The square root of 222231131 is about 14907.4186564945. The cubic root of 222231131 is about 605.7149583310.

Adding to 222231131 its reverse (131132222), we get a palindrome (353363353).

The spelling of 222231131 in words is "two hundred twenty-two million, two hundred thirty-one thousand, one hundred thirty-one".