206426123522 has 4 divisors (see below), whose sum is σ = 309639185286. Its totient is φ = 103213061760.

The previous prime is 206426123483. The next prime is 206426123537. The reversal of 206426123522 is 225321624602.

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

It can be written as a sum of positive squares in only one way, i.e., 130343382961 + 76082740561 = 361031^2 + 275831^2 .

It is a super-2 number, since 2×206426123522² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51606530879 + ... + 51606530882.

Almost surely, 2^206426123522 is an apocalyptic number.

206426123522 is a deficient number, since it is larger than the sum of its proper divisors (103213061764).

206426123522 is a wasteful number, since it uses less digits than its factorization.

206426123522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103213061763.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 206426123522 in words is "two hundred six billion, four hundred twenty-six million, one hundred twenty-three thousand, five hundred twenty-two".