211242342431 has 8 divisors (see below), whose sum is σ = 223718806944. Its totient is φ = 198771482880.

The previous prime is 211242342419. The next prime is 211242342469. The reversal of 211242342431 is 134243242112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211242342431 is a prime.

It is a super-2 number, since 2×211242342431² (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 = 211242342394 and 211242342403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211242344431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1323515 + ... + 1474508.

It is an arithmetic number, because the mean of its divisors is an integer number (27964850868).

Almost surely, 2^211242342431 is an apocalyptic number.

211242342431 is a deficient number, since it is larger than the sum of its proper divisors (12476464513).

211242342431 is a wasteful number, since it uses less digits than its factorization.

211242342431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802481.

The product of its digits is 9216, while the sum is 29.

Adding to 211242342431 its reverse (134243242112), we get a palindrome (345485584543).

The spelling of 211242342431 in words is "two hundred eleven billion, two hundred forty-two million, three hundred forty-two thousand, four hundred thirty-one".