206213233505 has 8 divisors (see below), whose sum is σ = 250588233600. Its totient is φ = 162882351216.

The previous prime is 206213233481. The next prime is 206213233537. The reversal of 206213233505 is 505332312602.

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 206213233505 - 2⁶ = 206213233441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261029015 + ... + 261029804.

It is an arithmetic number, because the mean of its divisors is an integer number (31323529200).

Almost surely, 2^206213233505 is an apocalyptic number.

It is an amenable number.

206213233505 is a deficient number, since it is larger than the sum of its proper divisors (44375000095).

206213233505 is an equidigital number, since it uses as much as digits as its factorization.

206213233505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522058903.

The product of its (nonzero) digits is 32400, while the sum is 32.

The spelling of 206213233505 in words is "two hundred six billion, two hundred thirteen million, two hundred thirty-three thousand, five hundred five".