213243142042431 has 24 divisors (see below), whose sum is σ = 308217198722160. Its totient is φ = 142070121417600.

The previous prime is 213243142042421. The next prime is 213243142042517. The reversal of 213243142042431 is 134240241342312.

213243142042431 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 4 + 3 + 14 + 204 + 2 + 431 = 666.

It is not a de Polignac number, because 213243142042431 - 2¹⁰ = 213243142041407 is a prime.

It is a super-2 number, since 2×213243142042431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213243142042421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107203225 + ... + 109174253.

It is an arithmetic number, because the mean of its divisors is an integer number (12842383280090).

Almost surely, 2^{213243142042431} is an apocalyptic number.

213243142042431 is a deficient number, since it is larger than the sum of its proper divisors (94974056679729).

213243142042431 is a wasteful number, since it uses less digits than its factorization.

213243142042431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978807 (or 1978804 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

Adding to 213243142042431 its reverse (134240241342312), we get a palindrome (347483383384743).

The spelling of 213243142042431 in words is "two hundred thirteen trillion, two hundred forty-three billion, one hundred forty-two million, forty-two thousand, four hundred thirty-one".