213843841 has 4 divisors (see below), whose sum is σ = 225098800. Its totient is φ = 202588884.

The previous prime is 213843827. The next prime is 213843853. The reversal of 213843841 is 148348312.

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 a de Polignac number, because none of the positive numbers 2^k-213843841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213843797 and 213843806.

It is not an unprimeable number, because it can be changed into a prime (213843871) 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, 5627451 + ... + 5627488.

It is an arithmetic number, because the mean of its divisors is an integer number (56274700).

Almost surely, 2^213843841 is an apocalyptic number.

It is an amenable number.

213843841 is a deficient number, since it is larger than the sum of its proper divisors (11254959).

213843841 is a wasteful number, since it uses less digits than its factorization.

213843841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11254958.

The product of its digits is 18432, while the sum is 34.

The square root of 213843841 is about 14623.4004595374. The cubic root of 213843841 is about 597.9968764168.

The spelling of 213843841 in words is "two hundred thirteen million, eight hundred forty-three thousand, eight hundred forty-one".