206156512231 has 12 divisors (see below), whose sum is σ = 217596796200. Its totient is φ = 195289231248.

The previous prime is 206156512229. The next prime is 206156512253. The reversal of 206156512231 is 132215651602.

It is not a de Polignac number, because 206156512231 - 2¹ = 206156512229 is a prime.

It is a super-2 number, since 2×206156512231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206156512291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6579480 + ... + 6610738.

It is an arithmetic number, because the mean of its divisors is an integer number (18133066350).

Almost surely, 2^206156512231 is an apocalyptic number.

206156512231 is a deficient number, since it is larger than the sum of its proper divisors (11440283969).

206156512231 is a wasteful number, since it uses less digits than its factorization.

206156512231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49566 (or 49547 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 206156512231 in words is "two hundred six billion, one hundred fifty-six million, five hundred twelve thousand, two hundred thirty-one".