206631604 has 12 divisors (see below), whose sum is σ = 362319300. Its totient is φ = 103111808.

The previous prime is 206631559. The next prime is 206631653. The reversal of 206631604 is 406136602.

It can be written as a sum of positive squares in 2 ways, for example, as 156250000 + 50381604 = 12500^2 + 7098^2 .

It is a super-2 number, since 2×206631604² = 85393239543225632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48709 + ... + 52780.

It is an arithmetic number, because the mean of its divisors is an integer number (30193275).

Almost surely, 2^206631604 is an apocalyptic number.

It is an amenable number.

206631604 is a deficient number, since it is larger than the sum of its proper divisors (155687696).

206631604 is a wasteful number, since it uses less digits than its factorization.

206631604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102002 (or 102000 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 206631604 is about 14374.6862226624. The cubic root of 206631604 is about 591.1970373023.

It can be divided in two parts, 2066 and 31604, that added together give a triangular number (33670 = T₂₅₉).

The spelling of 206631604 in words is "two hundred six million, six hundred thirty-one thousand, six hundred four".