205423300431 has 12 divisors (see below), whose sum is σ = 296735460840. Its totient is φ = 136942905840.

The previous prime is 205423300427. The next prime is 205423300463. The reversal of 205423300431 is 134003324502.

205423300431 is a `hidden beast` number, since 205 + 4 + 23 + 3 + 0 + 0 + 431 = 666.

It is not a de Polignac number, because 205423300431 - 2² = 205423300427 is a prime.

It is a super-2 number, since 2×205423300431² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205423300395 and 205423300404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205423300471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 273216 + ... + 696773.

It is an arithmetic number, because the mean of its divisors is an integer number (24727955070).

Almost surely, 2^205423300431 is an apocalyptic number.

205423300431 is a deficient number, since it is larger than the sum of its proper divisors (91312160409).

205423300431 is a wasteful number, since it uses less digits than its factorization.

205423300431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993526 (or 993523 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 205423300431 its reverse (134003324502), we get a palindrome (339426624933).

The spelling of 205423300431 in words is "two hundred five billion, four hundred twenty-three million, three hundred thousand, four hundred thirty-one".