211202424431 has 4 divisors (see below), whose sum is σ = 214782126600. Its totient is φ = 207622722264.

The previous prime is 211202424401. The next prime is 211202424457. The reversal of 211202424431 is 134424202112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211202424431 - 2²² = 211198230127 is a prime.

It is a super-2 number, since 2×211202424431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211202424431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211202424401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1789850996 + ... + 1789851113.

It is an arithmetic number, because the mean of its divisors is an integer number (53695531650).

Almost surely, 2^211202424431 is an apocalyptic number.

211202424431 is a deficient number, since it is larger than the sum of its proper divisors (3579702169).

211202424431 is an equidigital number, since it uses as much as digits as its factorization.

211202424431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579702168.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 211202424431 its reverse (134424202112), we get a palindrome (345626626543).

The spelling of 211202424431 in words is "two hundred eleven billion, two hundred two million, four hundred twenty-four thousand, four hundred thirty-one".