131222222 has 24 divisors (see below), whose sum is σ = 210647088. Its totient is φ = 61191680.

The previous prime is 131222209. The next prime is 131222237. The reversal of 131222222 is 222222131.

131222222 is a modest number, since divided by 22222 gives 1312 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 131222222.

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, 76478 + ... + 78174.

It is an arithmetic number, because the mean of its divisors is an integer number (8776962).

Almost surely, 2^131222222 is an apocalyptic number.

131222222 is a deficient number, since it is larger than the sum of its proper divisors (79424866).

131222222 is a wasteful number, since it uses less digits than its factorization.

131222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804 (or 1763 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 131222222 is about 11455.2268419268. The cubic root of 131222222 is about 508.1623238677.

Adding to 131222222 its reverse (222222131), we get a palindrome (353444353).

Subtracting 131222222 from its reverse (222222131), we obtain a palindrome (90999909).

The spelling of 131222222 in words is "one hundred thirty-one million, two hundred twenty-two thousand, two hundred twenty-two".