205501451 has 2 divisors, whose sum is σ = 205501452. Its totient is φ = 205501450.

The previous prime is 205501433. The next prime is 205501459. The reversal of 205501451 is 154105502.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205501451 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (205501459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102750725 + 102750726.

It is an arithmetic number, because the mean of its divisors is an integer number (102750726).

Almost surely, 2^205501451 is an apocalyptic number.

205501451 is a deficient number, since it is larger than the sum of its proper divisors (1).

205501451 is an equidigital number, since it uses as much as digits as its factorization.

205501451 is an odious number, because the sum of its binary digits is odd.

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

The square root of 205501451 is about 14335.3217961788. The cubic root of 205501451 is about 590.1172332396.

Adding to 205501451 its reverse (154105502), we get a palindrome (359606953).

The spelling of 205501451 in words is "two hundred five million, five hundred one thousand, four hundred fifty-one".