213681803 has 4 divisors (see below), whose sum is σ = 213775728. Its totient is φ = 213587880.

The previous prime is 213681703. The next prime is 213681821. The reversal of 213681803 is 308186312.

It is a happy number.

213681803 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.

It is a cyclic number.

It is not a de Polignac number, because 213681803 - 2⁸ = 213681547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213681803.

It is not an unprimeable number, because it can be changed into a prime (213681833) 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, 43463 + ... + 48128.

It is an arithmetic number, because the mean of its divisors is an integer number (53443932).

Almost surely, 2^213681803 is an apocalyptic number.

213681803 is a deficient number, since it is larger than the sum of its proper divisors (93925).

213681803 is an equidigital number, since it uses as much as digits as its factorization.

213681803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93924.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 213681803 is about 14617.8590429652. The cubic root of 213681803 is about 597.8457962294.

The spelling of 213681803 in words is "two hundred thirteen million, six hundred eighty-one thousand, eight hundred three".