204001031 has 4 divisors (see below), whose sum is σ = 219693432. Its totient is φ = 188308632.

The previous prime is 204001013. The next prime is 204001067. The reversal of 204001031 is 130100402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130100402 = 2 ⋅65050201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204001031 is a prime.

It is a super-2 number, since 2×204001031² = 83232841298125922, which 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 (204001001) by changing a digit.

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, 7846181 + ... + 7846206.

It is an arithmetic number, because the mean of its divisors is an integer number (54923358).

Almost surely, 2^204001031 is an apocalyptic number.

204001031 is a deficient number, since it is larger than the sum of its proper divisors (15692401).

204001031 is a wasteful number, since it uses less digits than its factorization.

204001031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15692400.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 204001031 is about 14282.8929492593. The cubic root of 204001031 is about 588.6775233950.

Adding to 204001031 its reverse (130100402), we get a palindrome (334101433).

The spelling of 204001031 in words is "two hundred four million, one thousand, thirty-one".