206356131 has 12 divisors (see below), whose sum is σ = 313758120. Its totient is φ = 130330080.

The previous prime is 206356127. The next prime is 206356219. The reversal of 206356131 is 131653602.

206356131 is a `hidden beast` number, since 20 + 635 + 6 + 1 + 3 + 1 = 666.

It is not a de Polignac number, because 206356131 - 2² = 206356127 is a prime.

It is a super-2 number, since 2×206356131² = 85165705602578322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206356095 and 206356104.

It is not an unprimeable number, because it can be changed into a prime (206356531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 603210 + ... + 603551.

It is an arithmetic number, because the mean of its divisors is an integer number (26146510).

Almost surely, 2^206356131 is an apocalyptic number.

206356131 is a deficient number, since it is larger than the sum of its proper divisors (107401989).

206356131 is a wasteful number, since it uses less digits than its factorization.

206356131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206786 (or 1206783 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 206356131 is about 14365.1011482690. The cubic root of 206356131 is about 590.9342003754.

The spelling of 206356131 in words is "two hundred six million, three hundred fifty-six thousand, one hundred thirty-one".