131224210 has 16 divisors (see below), whose sum is σ = 254373336. Its totient is φ = 48451968.

The previous prime is 131224199. The next prime is 131224213. The reversal of 131224210 is 12422131.

It can be written as a sum of positive squares in 4 ways, for example, as 91948921 + 39275289 = 9589^2 + 6267^2 .

It is not an unprimeable number, because it can be changed into a prime (131224213) by changing a digit.

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, 504579 + ... + 504838.

Almost surely, 2^131224210 is an apocalyptic number.

131224210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131224210 is a deficient number, since it is larger than the sum of its proper divisors (123149126).

131224210 is a wasteful number, since it uses less digits than its factorization.

131224210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009437.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 131224210 is about 11455.3136142141. The cubic root of 131224210 is about 508.1648900530.

Adding to 131224210 its reverse (12422131), we get a palindrome (143646341).

The spelling of 131224210 in words is "one hundred thirty-one million, two hundred twenty-four thousand, two hundred ten".