213117001 has 4 divisors (see below), whose sum is σ = 213611904. Its totient is φ = 212622100.

The previous prime is 213116999. The next prime is 213117007. The reversal of 213117001 is 100711312.

213117001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 213117001 - 2¹ = 213116999 is a prime.

It is a super-2 number, since 2×213117001² = 90837712230468002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213117007) 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, 246805 + ... + 247666.

It is an arithmetic number, because the mean of its divisors is an integer number (53402976).

Almost surely, 2^213117001 is an apocalyptic number.

It is an amenable number.

213117001 is a deficient number, since it is larger than the sum of its proper divisors (494903).

213117001 is an equidigital number, since it uses as much as digits as its factorization.

213117001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494902.

The product of its (nonzero) digits is 42, while the sum is 16.

The square root of 213117001 is about 14598.5273572371. The cubic root of 213117001 is about 597.3185910762.

Adding to 213117001 its reverse (100711312), we get a palindrome (313828313).

The spelling of 213117001 in words is "two hundred thirteen million, one hundred seventeen thousand, one".