205262431 has 4 divisors (see below), whose sum is σ = 223922664. Its totient is φ = 186602200.

The previous prime is 205262429. The next prime is 205262443. The reversal of 205262431 is 134262502.

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 205262431 - 2¹ = 205262429 is a prime.

It is a super-2 number, since 2×205262431² = 84265331160059522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205262396 and 205262405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205262531) 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, 9330100 + ... + 9330121.

It is an arithmetic number, because the mean of its divisors is an integer number (55980666).

Almost surely, 2^205262431 is an apocalyptic number.

205262431 is a deficient number, since it is larger than the sum of its proper divisors (18660233).

205262431 is a wasteful number, since it uses less digits than its factorization.

205262431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18660232.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 205262431 is about 14326.9826202170. The cubic root of 205262431 is about 589.8883548204. Note that the first 3 decimals are identical.

The spelling of 205262431 in words is "two hundred five million, two hundred sixty-two thousand, four hundred thirty-one".