451940201 has 2 divisors, whose sum is σ = 451940202. Its totient is φ = 451940200.

The previous prime is 451940197. The next prime is 451940221. The reversal of 451940201 is 102049154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 413064976 + 38875225 = 20324^2 + 6235^2 .

It is a cyclic number.

It is not a de Polignac number, because 451940201 - 2² = 451940197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (451940221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225970100 + 225970101.

It is an arithmetic number, because the mean of its divisors is an integer number (225970101).

Almost surely, 2^451940201 is an apocalyptic number.

It is an amenable number.

451940201 is a deficient number, since it is larger than the sum of its proper divisors (1).

451940201 is an equidigital number, since it uses as much as digits as its factorization.

451940201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 451940201 is about 21258.8852247713. The cubic root of 451940201 is about 767.4091824904.

Adding to 451940201 its reverse (102049154), we get a palindrome (553989355).

The spelling of 451940201 in words is "four hundred fifty-one million, nine hundred forty thousand, two hundred one".