213928845 has 32 divisors (see below), whose sum is σ = 372097152. Its totient is φ = 104324352.

The previous prime is 213928843. The next prime is 213928849. The reversal of 213928845 is 548829312.

It is not a de Polignac number, because 213928845 - 2¹ = 213928843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213928797 and 213928806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213928843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15739 + ... + 25991.

It is an arithmetic number, because the mean of its divisors is an integer number (11628036).

Almost surely, 2^213928845 is an apocalyptic number.

It is an amenable number.

213928845 is a deficient number, since it is larger than the sum of its proper divisors (158168307).

213928845 is a wasteful number, since it uses less digits than its factorization.

213928845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10381.

The product of its digits is 138240, while the sum is 42.

The square root of 213928845 is about 14626.3066083000. The cubic root of 213928845 is about 598.0761015068.

The spelling of 213928845 in words is "two hundred thirteen million, nine hundred twenty-eight thousand, eight hundred forty-five".