131222210 has 16 divisors (see below), whose sum is σ = 269942976. Its totient is φ = 44990448.

The previous prime is 131222209. The next prime is 131222237. The reversal of 131222210 is 12222131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

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 in 7 ways as a sum of consecutive naturals, for example, 937232 + ... + 937371.

It is an arithmetic number, because the mean of its divisors is an integer number (16871436).

Almost surely, 2^131222210 is an apocalyptic number.

131222210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131222210 is an abundant number, since it is smaller than the sum of its proper divisors (138720766).

131222210 is a wasteful number, since it uses less digits than its factorization.

131222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874617.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 131222210 is about 11455.2263181484. The cubic root of 131222210 is about 508.1623083776.

Adding to 131222210 its reverse (12222131), we get a palindrome (143444341).

The spelling of 131222210 in words is "one hundred thirty-one million, two hundred twenty-two thousand, two hundred ten".