206204531 has 4 divisors (see below), whose sum is σ = 222066432. Its totient is φ = 190342632.

The previous prime is 206204513. The next prime is 206204533. The reversal of 206204531 is 135402602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206204531 is a prime.

It is a super-2 number, since 2×206204531² = 85040617209859922, 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 = 206204497 and 206204506.

It is not an unprimeable number, because it can be changed into a prime (206204533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7930931 + ... + 7930956.

It is an arithmetic number, because the mean of its divisors is an integer number (55516608).

Almost surely, 2^206204531 is an apocalyptic number.

206204531 is a deficient number, since it is larger than the sum of its proper divisors (15861901).

206204531 is a wasteful number, since it uses less digits than its factorization.

206204531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15861900.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 206204531 is about 14359.8235017008. The cubic root of 206204531 is about 590.7894545398.

The spelling of 206204531 in words is "two hundred six million, two hundred four thousand, five hundred thirty-one".