205123256 has 32 divisors (see below), whose sum is σ = 415724400. Its totient is φ = 94321920.

The previous prime is 205123253. The next prime is 205123267. The reversal of 205123256 is 652321502.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205123253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25715 + ... + 32733.

Almost surely, 2^205123256 is an apocalyptic number.

205123256 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

205123256 is an abundant number, since it is smaller than the sum of its proper divisors (210601144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205123256 is a wasteful number, since it uses less digits than its factorization.

205123256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7319 (or 7315 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 205123256 is about 14322.1247027108. The cubic root of 205123256 is about 589.7550031343.

Adding to 205123256 its reverse (652321502), we get a palindrome (857444758).

It can be divided in two parts, 205123 and 256, that added together give a cube (205379 = 59³).

The spelling of 205123256 in words is "two hundred five million, one hundred twenty-three thousand, two hundred fifty-six".