213815001 has 16 divisors (see below), whose sum is σ = 305683200. Its totient is φ = 132457728.

The previous prime is 213814987. The next prime is 213815011. The reversal of 213815001 is 100518312.

It is not a de Polignac number, because 213815001 - 2⁷ = 213814873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213815011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22506 + ... + 30563.

It is an arithmetic number, because the mean of its divisors is an integer number (19105200).

Almost surely, 2^213815001 is an apocalyptic number.

It is an amenable number.

213815001 is a deficient number, since it is larger than the sum of its proper divisors (91868199).

213815001 is a wasteful number, since it uses less digits than its factorization.

213815001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53168.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 213815001 is about 14622.4143355330. The cubic root of 213815001 is about 597.9699923049.

The spelling of 213815001 in words is "two hundred thirteen million, eight hundred fifteen thousand, one".