206931042 has 24 divisors (see below), whose sum is σ = 448893900. Its totient is φ = 68893440.

The previous prime is 206931019. The next prime is 206931073. The reversal of 206931042 is 240139602.

It can be written as a sum of positive squares in 2 ways, for example, as 202806081 + 4124961 = 14241^2 + 2031^2 .

It is a super-2 number, since 2×206931042² = 85640912286411528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206930997 and 206931015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9334 + ... + 22382.

Almost surely, 2^206931042 is an apocalyptic number.

206931042 is an abundant number, since it is smaller than the sum of its proper divisors (241962858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206931042 is a wasteful number, since it uses less digits than its factorization.

206931042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13938 (or 13935 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 206931042 is about 14385.0979141610. The cubic root of 206931042 is about 591.4824751082.

The spelling of 206931042 in words is "two hundred six million, nine hundred thirty-one thousand, forty-two".