205261550 has 48 divisors (see below), whose sum is σ = 412650672. Its totient is φ = 75513600.

The previous prime is 205261493. The next prime is 205261561. The reversal of 205261550 is 55162502.

205261550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 296705 + ... + 297395.

It is an arithmetic number, because the mean of its divisors is an integer number (8596889).

Almost surely, 2^205261550 is an apocalyptic number.

205261550 is an abundant number, since it is smaller than the sum of its proper divisors (207389122).

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

205261550 is a wasteful number, since it uses less digits than its factorization.

205261550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173 (or 1168 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 205261550 is about 14326.9518740031. The cubic root of 205261550 is about 589.8875108725.

The spelling of 205261550 in words is "two hundred five million, two hundred sixty-one thousand, five hundred fifty".