204228646631 has 4 divisors (see below), whose sum is σ = 204232117200. Its totient is φ = 204225176064.

The previous prime is 204228646619. The next prime is 204228646637. The reversal of 204228646631 is 136646822402.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 204228646631 - 2³⁰ = 203154904807 is a prime.

It is a super-2 number, since 2×204228646631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204228646637) 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, 1645466 + ... + 1765223.

It is an arithmetic number, because the mean of its divisors is an integer number (51058029300).

Almost surely, 2^204228646631 is an apocalyptic number.

204228646631 is a deficient number, since it is larger than the sum of its proper divisors (3470569).

204228646631 is an equidigital number, since it uses as much as digits as its factorization.

204228646631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3470568.

The product of its (nonzero) digits is 663552, while the sum is 44.

The spelling of 204228646631 in words is "two hundred four billion, two hundred twenty-eight million, six hundred forty-six thousand, six hundred thirty-one".