131423131421224 has 8 divisors (see below), whose sum is σ = 246418371414810. Its totient is φ = 65711565710608.

The previous prime is 131423131421209. The next prime is 131423131421227. The reversal of 131423131421224 is 422124131324131.

It can be written as a sum of positive squares in only one way, i.e., 131258037104100 + 165094317124 = 11456790^2 + 406318^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 131423131421224.

It is not an unprimeable number, because it can be changed into a prime (131423131421227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8213945713819 + ... + 8213945713834.

Almost surely, 2^{131423131421224} is an apocalyptic number.

It is an amenable number.

131423131421224 is a deficient number, since it is larger than the sum of its proper divisors (114995239993586).

131423131421224 is a wasteful number, since it uses less digits than its factorization.

131423131421224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16427891427659 (or 16427891427655 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

Adding to 131423131421224 its reverse (422124131324131), we get a palindrome (553547262745355).

The spelling of 131423131421224 in words is "one hundred thirty-one trillion, four hundred twenty-three billion, one hundred thirty-one million, four hundred twenty-one thousand, two hundred twenty-four".