213216959 has 4 divisors (see below), whose sum is σ = 215328120. Its totient is φ = 211105800.

The previous prime is 213216953. The next prime is 213216967. The reversal of 213216959 is 959612312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213216959 is a prime.

It is a super-2 number, since 2×213216959² = 90922943210415362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213216953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055429 + ... + 1055630.

It is an arithmetic number, because the mean of its divisors is an integer number (53832030).

Almost surely, 2^213216959 is an apocalyptic number.

213216959 is a deficient number, since it is larger than the sum of its proper divisors (2111161).

213216959 is a wasteful number, since it uses less digits than its factorization.

213216959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111160.

The product of its digits is 29160, while the sum is 38.

The square root of 213216959 is about 14601.9505203928. The cubic root of 213216959 is about 597.4119630099.

It can be divided in two parts, 2132 and 16959, that added together give a palindrome (19091).

The spelling of 213216959 in words is "two hundred thirteen million, two hundred sixteen thousand, nine hundred fifty-nine".