204120431 has 4 divisors (see below), whose sum is σ = 204151200. Its totient is φ = 204089664.

The previous prime is 204120419. The next prime is 204120463. The reversal of 204120431 is 134021402.

204120431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204120431 is a prime.

It is a super-2 number, since 2×204120431² = 83330300703251522, 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 (204120031) 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, 866 + ... + 20223.

It is an arithmetic number, because the mean of its divisors is an integer number (51037800).

Almost surely, 2^204120431 is an apocalyptic number.

204120431 is a deficient number, since it is larger than the sum of its proper divisors (30769).

204120431 is an equidigital number, since it uses as much as digits as its factorization.

204120431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30768.

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

The square root of 204120431 is about 14287.0721633230. The cubic root of 204120431 is about 588.7923502456.

Adding to 204120431 its reverse (134021402), we get a palindrome (338141833).

The spelling of 204120431 in words is "two hundred four million, one hundred twenty thousand, four hundred thirty-one".