213604765 has 16 divisors (see below), whose sum is σ = 280760256. Its totient is φ = 154720000.

The previous prime is 213604763. The next prime is 213604771. The reversal of 213604765 is 567406312.

It is a happy number.

It is not a de Polignac number, because 213604765 - 2¹ = 213604763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213604765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213604763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6069 + ... + 21541.

It is an arithmetic number, because the mean of its divisors is an integer number (17547516).

Almost surely, 2^213604765 is an apocalyptic number.

It is an amenable number.

213604765 is a deficient number, since it is larger than the sum of its proper divisors (67155491).

213604765 is a wasteful number, since it uses less digits than its factorization.

213604765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15740.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 213604765 is about 14615.2237410174. The cubic root of 213604765 is about 597.7739411318.

It can be divided in two parts, 213604 and 765, that added together give a square (214369 = 463²).

The spelling of 213604765 in words is "two hundred thirteen million, six hundred four thousand, seven hundred sixty-five".