205751401 has 2 divisors, whose sum is σ = 205751402. Its totient is φ = 205751400.

The previous prime is 205751393. The next prime is 205751411. The reversal of 205751401 is 104157502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198781801 + 6969600 = 14099^2 + 2640^2 .

It is a cyclic number.

It is not a de Polignac number, because 205751401 - 2³ = 205751393 is a prime.

It is not a weakly prime, because it can be changed into another prime (205751411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102875700 + 102875701.

It is an arithmetic number, because the mean of its divisors is an integer number (102875701).

Almost surely, 2^205751401 is an apocalyptic number.

It is an amenable number.

205751401 is a deficient number, since it is larger than the sum of its proper divisors (1).

205751401 is an equidigital number, since it uses as much as digits as its factorization.

205751401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 205751401 is about 14344.0371234879. The cubic root of 205751401 is about 590.3563881476.

The spelling of 205751401 in words is "two hundred five million, seven hundred fifty-one thousand, four hundred one".