204100320031 has 4 divisors (see below), whose sum is σ = 204164284464. Its totient is φ = 204036355600.

The previous prime is 204100320019. The next prime is 204100320049. The reversal of 204100320031 is 130023001402.

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 204100320031 - 2⁵ = 204100319999 is a prime.

It is a super-2 number, since 2×204100320031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204100319987 and 204100320014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204100329031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31977430 + ... + 31983811.

It is an arithmetic number, because the mean of its divisors is an integer number (51041071116).

Almost surely, 2^204100320031 is an apocalyptic number.

204100320031 is a deficient number, since it is larger than the sum of its proper divisors (63964433).

204100320031 is an equidigital number, since it uses as much as digits as its factorization.

204100320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63964432.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 204100320031 its reverse (130023001402), we get a palindrome (334123321433).

The spelling of 204100320031 in words is "two hundred four billion, one hundred million, three hundred twenty thousand, thirty-one".