431223666111 has 32 divisors (see below), whose sum is σ = 743889899520. Its totient is φ = 241764206112.

The previous prime is 431223666109. The next prime is 431223666191. The reversal of 431223666111 is 111666322134.

It is not a de Polignac number, because 431223666111 - 2¹ = 431223666109 is a prime.

It is a super-2 number, since 2×431223666111² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431223666191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21514575 + ... + 21534608.

It is an arithmetic number, because the mean of its divisors is an integer number (23246559360).

Almost surely, 2^431223666111 is an apocalyptic number.

431223666111 is a deficient number, since it is larger than the sum of its proper divisors (312666233409).

431223666111 is a wasteful number, since it uses less digits than its factorization.

431223666111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43049252 (or 43049246 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

Adding to 431223666111 its reverse (111666322134), we get a palindrome (542889988245).

The spelling of 431223666111 in words is "four hundred thirty-one billion, two hundred twenty-three million, six hundred sixty-six thousand, one hundred eleven".