205045442431 has 2 divisors, whose sum is σ = 205045442432. Its totient is φ = 205045442430.

The previous prime is 205045442419. The next prime is 205045442491. The reversal of 205045442431 is 134244540502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205045442431 - 2¹³ = 205045434239 is a prime.

It is a super-2 number, since 2×205045442431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205045442491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102522721215 + 102522721216.

It is an arithmetic number, because the mean of its divisors is an integer number (102522721216).

Almost surely, 2^205045442431 is an apocalyptic number.

205045442431 is a deficient number, since it is larger than the sum of its proper divisors (1).

205045442431 is an equidigital number, since it uses as much as digits as its factorization.

205045442431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 205045442431 its reverse (134244540502), we get a palindrome (339289982933).

The spelling of 205045442431 in words is "two hundred five billion, forty-five million, four hundred forty-two thousand, four hundred thirty-one".