204211431 has 12 divisors (see below), whose sum is σ = 295101352. Its totient is φ = 136081296.

The previous prime is 204211409. The next prime is 204211451. The reversal of 204211431 is 134112402.

204211431 is a `hidden beast` number, since 20 + 4 + 211 + 431 = 666.

It is not a de Polignac number, because 204211431 - 2⁶ = 204211367 is a prime.

It is a super-2 number, since 2×204211431² = 83404617102135522, 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 (204211451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28725 + ... + 35121.

Almost surely, 2^204211431 is an apocalyptic number.

204211431 is a deficient number, since it is larger than the sum of its proper divisors (90889921).

204211431 is a wasteful number, since it uses less digits than its factorization.

204211431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9950 (or 9947 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 204211431 is about 14290.2565057454. The cubic root of 204211431 is about 588.8798347816.

Adding to 204211431 its reverse (134112402), we get a palindrome (338323833).

The spelling of 204211431 in words is "two hundred four million, two hundred eleven thousand, four hundred thirty-one".