204142031 has 4 divisors (see below), whose sum is σ = 204270672. Its totient is φ = 204013392.

The previous prime is 204142021. The next prime is 204142033. The reversal of 204142031 is 130241402.

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 204142031 - 2¹⁸ = 203879887 is a prime.

It is a super-2 number, since 2×204142031² = 83347937641609922, 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 (204142033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61910 + ... + 65123.

It is an arithmetic number, because the mean of its divisors is an integer number (51067668).

Almost surely, 2^204142031 is an apocalyptic number.

204142031 is a deficient number, since it is larger than the sum of its proper divisors (128641).

204142031 is a wasteful number, since it uses less digits than its factorization.

204142031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128640.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 204142031 is about 14287.8280714740. The cubic root of 204142031 is about 588.8131181589.

Adding to 204142031 its reverse (130241402), we get a palindrome (334383433).

The spelling of 204142031 in words is "two hundred four million, one hundred forty-two thousand, thirty-one".