213284765 has 8 divisors (see below), whose sum is σ = 257372640. Its totient is φ = 169673872.

The previous prime is 213284749. The next prime is 213284767. The reversal of 213284765 is 567482312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213284765 - 2⁴ = 213284749 is a prime.

It is a super-2 number, since 2×213284765² = 90980781962210450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213284767) 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, 118259 + ... + 120048.

It is an arithmetic number, because the mean of its divisors is an integer number (32171580).

Almost surely, 2^213284765 is an apocalyptic number.

It is an amenable number.

213284765 is a deficient number, since it is larger than the sum of its proper divisors (44087875).

213284765 is a wasteful number, since it uses less digits than its factorization.

213284765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238491.

The product of its digits is 80640, while the sum is 38.

The square root of 213284765 is about 14604.2721489296. The cubic root of 213284765 is about 597.4752847745.

The spelling of 213284765 in words is "two hundred thirteen million, two hundred eighty-four thousand, seven hundred sixty-five".