205253031 has 4 divisors (see below), whose sum is σ = 273670712. Its totient is φ = 136835352.

The previous prime is 205252987. The next prime is 205253051. The reversal of 205253031 is 130352502.

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

It is not a de Polignac number, because 205253031 - 2⁶ = 205252967 is a prime.

It is a super-2 number, since 2×205253031² = 84257613469373922, 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 = 205252989 and 205253007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205253051) 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, 34208836 + ... + 34208841.

It is an arithmetic number, because the mean of its divisors is an integer number (68417678).

Almost surely, 2^205253031 is an apocalyptic number.

205253031 is a deficient number, since it is larger than the sum of its proper divisors (68417681).

205253031 is an equidigital number, since it uses as much as digits as its factorization.

205253031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68417680.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 205253031 is about 14326.6545641332. The cubic root of 205253031 is about 589.8793500305.

The spelling of 205253031 in words is "two hundred five million, two hundred fifty-three thousand, thirty-one".