205257023 has 8 divisors (see below), whose sum is σ = 206332896. Its totient is φ = 204184800.

The previous prime is 205257011. The next prime is 205257043. The reversal of 205257023 is 320752502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205257023 - 2⁶ = 205256959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205256983 and 205257001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205257043) 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 7 ways as a sum of consecutive naturals, for example, 248990 + ... + 249812.

It is an arithmetic number, because the mean of its divisors is an integer number (25791612).

Almost surely, 2^205257023 is an apocalyptic number.

205257023 is a deficient number, since it is larger than the sum of its proper divisors (1075873).

205257023 is an equidigital number, since it uses as much as digits as its factorization.

205257023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 205257023 is about 14326.7938841878. The cubic root of 205257023 is about 589.8831742260.

The spelling of 205257023 in words is "two hundred five million, two hundred fifty-seven thousand, twenty-three".