206221137238 has 32 divisors (see below), whose sum is σ = 314676887040. Its totient is φ = 101346000000.

The previous prime is 206221137233. The next prime is 206221137263. The reversal of 206221137238 is 832731122602.

206221137238 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 206221137197 and 206221137206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206221137233) 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, 19632988 + ... + 19643488.

It is an arithmetic number, because the mean of its divisors is an integer number (9833652720).

Almost surely, 2^206221137238 is an apocalyptic number.

206221137238 is a deficient number, since it is larger than the sum of its proper divisors (108455749802).

206221137238 is a wasteful number, since it uses less digits than its factorization.

206221137238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11304.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 206221137238 in words is "two hundred six billion, two hundred twenty-one million, one hundred thirty-seven thousand, two hundred thirty-eight".