206426055331 has 4 divisors (see below), whose sum is σ = 213544195200. Its totient is φ = 199307915464.

The previous prime is 206426055299. The next prime is 206426055337. The reversal of 206426055331 is 133550624602.

206426055331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206426055331 - 2⁵ = 206426055299 is a prime.

It is a super-2 number, since 2×206426055331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206426055337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3559069891 + ... + 3559069948.

It is an arithmetic number, because the mean of its divisors is an integer number (53386048800).

Almost surely, 2^206426055331 is an apocalyptic number.

206426055331 is a deficient number, since it is larger than the sum of its proper divisors (7118139869).

206426055331 is an equidigital number, since it uses as much as digits as its factorization.

206426055331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7118139868.

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 206426055331 its reverse (133550624602), we get a palindrome (339976679933).

It can be divided in two parts, 20642605 and 5331, that added together give a square (20647936 = 4544²).

The spelling of 206426055331 in words is "two hundred six billion, four hundred twenty-six million, fifty-five thousand, three hundred thirty-one".