205572270 has 32 divisors (see below), whose sum is σ = 494057088. Its totient is φ = 54743328.

The previous prime is 205572251. The next prime is 205572317. The reversal of 205572270 is 72275502.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19257 + ... + 27963.

It is an arithmetic number, because the mean of its divisors is an integer number (15439284).

Almost surely, 2^205572270 is an apocalyptic number.

205572270 is an abundant number, since it is smaller than the sum of its proper divisors (288484818).

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

205572270 is a wasteful number, since it uses less digits than its factorization.

205572270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9504.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 205572270 is about 14337.7916709652. The cubic root of 205572270 is about 590.1850133168.

The spelling of 205572270 in words is "two hundred five million, five hundred seventy-two thousand, two hundred seventy".