201415009 has 2 divisors, whose sum is σ = 201415010. Its totient is φ = 201415008.

The previous prime is 201415007. The next prime is 201415033. The reversal of 201415009 is 900514102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198725409 + 2689600 = 14097^2 + 1640^2 .

It is a cyclic number.

It is not a de Polignac number, because 201415009 - 2¹ = 201415007 is a prime.

Together with 201415007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (201415007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100707504 + 100707505.

It is an arithmetic number, because the mean of its divisors is an integer number (100707505).

Almost surely, 2^201415009 is an apocalyptic number.

It is an amenable number.

201415009 is a deficient number, since it is larger than the sum of its proper divisors (1).

201415009 is an equidigital number, since it uses as much as digits as its factorization.

201415009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 201415009 is about 14192.0755705429. The cubic root of 201415009 is about 586.1794782746.

The spelling of 201415009 in words is "two hundred one million, four hundred fifteen thousand, nine".