213166001 has 4 divisors (see below), whose sum is σ = 222434112. Its totient is φ = 203897892.

The previous prime is 213165989. The next prime is 213166003. The reversal of 213166001 is 100661312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213166001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213166003) 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, 4634021 + ... + 4634066.

It is an arithmetic number, because the mean of its divisors is an integer number (55608528).

Almost surely, 2^213166001 is an apocalyptic number.

It is an amenable number.

213166001 is a deficient number, since it is larger than the sum of its proper divisors (9268111).

213166001 is an equidigital number, since it uses as much as digits as its factorization.

213166001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9268110.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 213166001 is about 14600.2055122522. The cubic root of 213166001 is about 597.3643661950.

The spelling of 213166001 in words is "two hundred thirteen million, one hundred sixty-six thousand, one".