205152123 has 8 divisors (see below), whose sum is σ = 298403136. Its totient is φ = 124334600.

The previous prime is 205152091. The next prime is 205152127. The reversal of 205152123 is 321251502.

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 205152123 - 2⁵ = 205152091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205152123.

It is not an unprimeable number, because it can be changed into a prime (205152127) 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, 3108333 + ... + 3108398.

It is an arithmetic number, because the mean of its divisors is an integer number (37300392).

Almost surely, 2^205152123 is an apocalyptic number.

205152123 is a deficient number, since it is larger than the sum of its proper divisors (93251013).

205152123 is a wasteful number, since it uses less digits than its factorization.

205152123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6216745.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 205152123 is about 14323.1324437080. The cubic root of 205152123 is about 589.7826672478.

It can be divided in two parts, 20515212 and 3, that added together give a triangular number (20515215 = T₆₄₀₅).

The spelling of 205152123 in words is "two hundred five million, one hundred fifty-two thousand, one hundred twenty-three".