206526431 has 4 divisors (see below), whose sum is σ = 206555232. Its totient is φ = 206497632.

The previous prime is 206526427. The next prime is 206526449. The reversal of 206526431 is 134625602.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 206526431 - 2² = 206526427 is a prime.

It is a super-2 number, since 2×206526431² = 85306333403195522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206526394 and 206526403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206526401) 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, 5831 + ... + 21143.

It is an arithmetic number, because the mean of its divisors is an integer number (51638808).

Almost surely, 2^206526431 is an apocalyptic number.

206526431 is a deficient number, since it is larger than the sum of its proper divisors (28801).

206526431 is a wasteful number, since it uses less digits than its factorization.

206526431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28800.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 206526431 is about 14371.0274858828. The cubic root of 206526431 is about 591.0967162203.

The spelling of 206526431 in words is "two hundred six million, five hundred twenty-six thousand, four hundred thirty-one".