205410551 has 2 divisors, whose sum is σ = 205410552. Its totient is φ = 205410550.

The previous prime is 205410547. The next prime is 205410559. The reversal of 205410551 is 155014502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205410551 - 2² = 205410547 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205410559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102705275 + 102705276.

It is an arithmetic number, because the mean of its divisors is an integer number (102705276).

Almost surely, 2^205410551 is an apocalyptic number.

205410551 is a deficient number, since it is larger than the sum of its proper divisors (1).

205410551 is an equidigital number, since it uses as much as digits as its factorization.

205410551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 205410551 is about 14332.1509551079. The cubic root of 205410551 is about 590.0302110356.

The spelling of 205410551 in words is "two hundred five million, four hundred ten thousand, five hundred fifty-one".