213165366 has 16 divisors (see below), whose sum is σ = 426591984. Its totient is φ = 71011584.

The previous prime is 213165307. The next prime is 213165367. The reversal of 213165366 is 663561312.

213165366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213165367) 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, 666 + ... + 20658.

It is an arithmetic number, because the mean of its divisors is an integer number (26661999).

Almost surely, 2^213165366 is an apocalyptic number.

213165366 is an abundant number, since it is smaller than the sum of its proper divisors (213426618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213165366 is a wasteful number, since it uses less digits than its factorization.

213165366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21775.

The product of its digits is 19440, while the sum is 33.

The square root of 213165366 is about 14600.1837659668. The cubic root of 213165366 is about 597.3637730317.

It can be divided in two parts, 213165 and 366, that added together give a triangular number (213531 = T₆₅₃).

The spelling of 213165366 in words is "two hundred thirteen million, one hundred sixty-five thousand, three hundred sixty-six".