205453031 has 6 divisors (see below), whose sum is σ = 238996440. Its totient is φ = 176102556.

The previous prime is 205453019. The next prime is 205453037. The reversal of 205453031 is 130354502.

It is a de Polignac number, because none of the positive numbers 2^k-205453031 is a prime.

It is a super-2 number, since 2×205453031² = 84421895894173922, 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 = 205452988 and 205453006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205453037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2096411 + ... + 2096508.

It is an arithmetic number, because the mean of its divisors is an integer number (39832740).

Almost surely, 2^205453031 is an apocalyptic number.

205453031 is a deficient number, since it is larger than the sum of its proper divisors (33543409).

205453031 is an equidigital number, since it uses as much as digits as its factorization.

205453031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4192933 (or 4192926 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 205453031 is about 14333.6328612114. The cubic root of 205453031 is about 590.0708820327.

The spelling of 205453031 in words is "two hundred five million, four hundred fifty-three thousand, thirty-one".