210000001 has 4 divisors (see below), whose sum is σ = 211160404. Its totient is φ = 208839600.

The previous prime is 209999987. The next prime is 210000017. The reversal of 210000001 is 100000012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11048976 + 198951025 = 3324^2 + 14105^2 .

It is a cyclic number.

It is not a de Polignac number, because 210000001 - 2⁷ = 209999873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210000701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 579930 + ... + 580291.

It is an arithmetic number, because the mean of its divisors is an integer number (52790101).

Almost surely, 2^210000001 is an apocalyptic number.

It is an amenable number.

210000001 is a deficient number, since it is larger than the sum of its proper divisors (1160403).

210000001 is a wasteful number, since it uses less digits than its factorization.

210000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160402.

The product of its (nonzero) digits is 2, while the sum is 4.

The square root of 210000001 is about 14491.3767806927. The cubic root of 210000001 is about 594.3921962198.

Adding to 210000001 its reverse (100000012), we get a palindrome (310000013).

It can be divided in two parts, 2 and 10000001, that multiplied together give a palindrome (20000002).

The spelling of 210000001 in words is "two hundred ten million, one", and thus it is an aban number.