204651431 has 4 divisors (see below), whose sum is σ = 204687000. Its totient is φ = 204615864.

The previous prime is 204651427. The next prime is 204651437. The reversal of 204651431 is 134156402.

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 204651431 - 2² = 204651427 is a prime.

It is a super-2 number, since 2×204651431² = 83764416420695522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204651431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204651437) 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, 6956 + ... + 21393.

It is an arithmetic number, because the mean of its divisors is an integer number (51171750).

Almost surely, 2^204651431 is an apocalyptic number.

204651431 is a deficient number, since it is larger than the sum of its proper divisors (35569).

204651431 is an equidigital number, since it uses as much as digits as its factorization.

204651431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35568.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 204651431 is about 14305.6433270231. The cubic root of 204651431 is about 589.3024706990.

The spelling of 204651431 in words is "two hundred four million, six hundred fifty-one thousand, four hundred thirty-one".