213891841 has 16 divisors (see below), whose sum is σ = 230014080. Its totient is φ = 198188800.

The previous prime is 213891827. The next prime is 213891871. The reversal of 213891841 is 148198312.

It is a cyclic number.

It is not a de Polignac number, because 213891841 - 2⁵ = 213891809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213891841.

It is not an unprimeable number, because it can be changed into a prime (213891871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 595620 + ... + 595978.

It is an arithmetic number, because the mean of its divisors is an integer number (14375880).

Almost surely, 2^213891841 is an apocalyptic number.

It is an amenable number.

213891841 is a deficient number, since it is larger than the sum of its proper divisors (16122239).

213891841 is a wasteful number, since it uses less digits than its factorization.

213891841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824.

The product of its digits is 13824, while the sum is 37.

The square root of 213891841 is about 14625.0415725905. The cubic root of 213891841 is about 598.0416157658.

The spelling of 213891841 in words is "two hundred thirteen million, eight hundred ninety-one thousand, eight hundred forty-one".