213423765 has 16 divisors (see below), whose sum is σ = 345000768. Its totient is φ = 112651776.

The previous prime is 213423703. The next prime is 213423767. The reversal of 213423765 is 567324312.

213423765 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 213423765 - 2¹¹ = 213421717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213423767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71887 + ... + 74796.

It is an arithmetic number, because the mean of its divisors is an integer number (21562548).

Almost surely, 2^213423765 is an apocalyptic number.

It is an amenable number.

213423765 is a deficient number, since it is larger than the sum of its proper divisors (131577003).

213423765 is a wasteful number, since it uses less digits than its factorization.

213423765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146788.

The product of its digits is 30240, while the sum is 33.

The square root of 213423765 is about 14609.0302552907. The cubic root of 213423765 is about 597.6050503015.

The spelling of 213423765 in words is "two hundred thirteen million, four hundred twenty-three thousand, seven hundred sixty-five".