205350404202431 has 2 divisors, whose sum is σ = 205350404202432. Its totient is φ = 205350404202430.

The previous prime is 205350404202367. The next prime is 205350404202539. The reversal of 205350404202431 is 134202404053502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205350404202431 - 2⁶ = 205350404202367 is a prime.

It is a super-2 number, since 2×205350404202431² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205350404202391 and 205350404202400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205350404204431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102675202101215 + 102675202101216.

It is an arithmetic number, because the mean of its divisors is an integer number (102675202101216).

Almost surely, 2^{205350404202431} is an apocalyptic number.

205350404202431 is a deficient number, since it is larger than the sum of its proper divisors (1).

205350404202431 is an equidigital number, since it uses as much as digits as its factorization.

205350404202431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 205350404202431 its reverse (134202404053502), we get a palindrome (339552808255933).

The spelling of 205350404202431 in words is "two hundred five trillion, three hundred fifty billion, four hundred four million, two hundred two thousand, four hundred thirty-one".