205439250 has 32 divisors (see below), whose sum is σ = 512778240. Its totient is φ = 54783600.

The previous prime is 205439249. The next prime is 205439261. The reversal of 205439250 is 52934502.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136210 + ... + 137709.

It is an arithmetic number, because the mean of its divisors is an integer number (16024320).

Almost surely, 2^205439250 is an apocalyptic number.

205439250 is an abundant number, since it is smaller than the sum of its proper divisors (307338990).

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

205439250 is a wasteful number, since it uses less digits than its factorization.

205439250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273939 (or 273929 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 205439250 is about 14333.1521306376. The cubic root of 205439250 is about 590.0576885084.

The spelling of 205439250 in words is "two hundred five million, four hundred thirty-nine thousand, two hundred fifty".