213878845 has 8 divisors (see below), whose sum is σ = 256766976. Its totient is φ = 171028176.

The previous prime is 213878809. The next prime is 213878849. The reversal of 213878845 is 548878312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213878845 - 2⁹ = 213878333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213878795 and 213878804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213878849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5284 + ... + 21346.

It is an arithmetic number, because the mean of its divisors is an integer number (32095872).

Almost surely, 2^213878845 is an apocalyptic number.

It is an amenable number.

213878845 is a deficient number, since it is larger than the sum of its proper divisors (42888131).

213878845 is a wasteful number, since it uses less digits than its factorization.

213878845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18731.

The product of its digits is 430080, while the sum is 46.

The square root of 213878845 is about 14624.5972594120. The cubic root of 213878845 is about 598.0295032479.

The spelling of 213878845 in words is "two hundred thirteen million, eight hundred seventy-eight thousand, eight hundred forty-five".