213206312052 has 60 divisors (see below), whose sum is σ = 558818996736. Its totient is φ = 70883171280.

The previous prime is 213206312047. The next prime is 213206312063. The reversal of 213206312052 is 250213602312.

It is a happy number.

213206312052 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 0 + 631 + 20 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 734974 + ... + 983157.

Almost surely, 2^213206312052 is an apocalyptic number.

It is an amenable number.

213206312052 is an abundant number, since it is smaller than the sum of its proper divisors (345612684684).

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

213206312052 is a wasteful number, since it uses less digits than its factorization.

213206312052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718530 (or 1718519 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 213206312052 its reverse (250213602312), we get a palindrome (463419914364).

The spelling of 213206312052 in words is "two hundred thirteen billion, two hundred six million, three hundred twelve thousand, fifty-two".