213440865 has 64 divisors (see below), whose sum is σ = 403107840. Its totient is φ = 95267840.

The previous prime is 213440849. The next prime is 213440873. The reversal of 213440865 is 568044312.

213440865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213440865 - 2⁴ = 213440849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a nialpdrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 131026 + ... + 132644.

It is an arithmetic number, because the mean of its divisors is an integer number (6298560).

Almost surely, 2^213440865 is an apocalyptic number.

It is an amenable number.

213440865 is a deficient number, since it is larger than the sum of its proper divisors (189666975).

213440865 is a wasteful number, since it uses less digits than its factorization.

213440865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 213440865 is about 14609.6154980205. The cubic root of 213440865 is about 597.6210103696.

The spelling of 213440865 in words is "two hundred thirteen million, four hundred forty thousand, eight hundred sixty-five".