205412551 has 2 divisors, whose sum is σ = 205412552. Its totient is φ = 205412550.

The previous prime is 205412507. The next prime is 205412573. The reversal of 205412551 is 155214502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205412551 - 2¹³ = 205404359 is a prime.

It is a super-2 number, since 2×205412551² = 84388632216655202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205410551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102706275 + 102706276.

It is an arithmetic number, because the mean of its divisors is an integer number (102706276).

Almost surely, 2^205412551 is an apocalyptic number.

205412551 is a deficient number, since it is larger than the sum of its proper divisors (1).

205412551 is an equidigital number, since it uses as much as digits as its factorization.

205412551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 205412551 is about 14332.2207281356. The cubic root of 205412551 is about 590.0321259918.

The spelling of 205412551 in words is "two hundred five million, four hundred twelve thousand, five hundred fifty-one".