213818869 has 16 divisors (see below), whose sum is σ = 237156480. Its totient is φ = 191160000.

The previous prime is 213818863. The next prime is 213818881. The reversal of 213818869 is 968818312.

It is a cyclic number.

It is not a de Polignac number, because 213818869 - 2⁹ = 213818357 is a prime.

It is a super-2 number, since 2×213818869² = 91437017480878322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213818863) 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 15 ways as a sum of consecutive naturals, for example, 180459 + ... + 181639.

It is an arithmetic number, because the mean of its divisors is an integer number (14822280).

Almost surely, 2^213818869 is an apocalyptic number.

It is an amenable number.

213818869 is a deficient number, since it is larger than the sum of its proper divisors (23337611).

213818869 is a wasteful number, since it uses less digits than its factorization.

213818869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452.

The product of its digits is 165888, while the sum is 46.

The square root of 213818869 is about 14622.5465976348. The cubic root of 213818869 is about 597.9735981230.

The spelling of 213818869 in words is "two hundred thirteen million, eight hundred eighteen thousand, eight hundred sixty-nine".