213243020431 has 8 divisors (see below), whose sum is σ = 243876387744. Its totient is φ = 182652172800.

The previous prime is 213243020401. The next prime is 213243020447. The reversal of 213243020431 is 134020342312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213243020431 - 2¹⁷ = 213242889359 is a prime.

It is a super-2 number, since 2×213243020431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213243020396 and 213243020405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213243020401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10619170 + ... + 10639231.

It is an arithmetic number, because the mean of its divisors is an integer number (30484548468).

Almost surely, 2^213243020431 is an apocalyptic number.

213243020431 is a deficient number, since it is larger than the sum of its proper divisors (30633367313).

213243020431 is a wasteful number, since it uses less digits than its factorization.

213243020431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21259841.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 213243020431 its reverse (134020342312), we get a palindrome (347263362743).

The spelling of 213243020431 in words is "two hundred thirteen billion, two hundred forty-three million, twenty thousand, four hundred thirty-one".