205150042 has 16 divisors (see below), whose sum is σ = 309727080. Its totient is φ = 101910528.

The previous prime is 205150009. The next prime is 205150051. The reversal of 205150042 is 240051502.

It can be written as a sum of positive squares in 4 ways, for example, as 205033761 + 116281 = 14319^2 + 341^2 .

It is a super-3 number, since 3×205150042³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355258 + ... + 355834.

Almost surely, 2^205150042 is an apocalyptic number.

205150042 is a deficient number, since it is larger than the sum of its proper divisors (104577038).

205150042 is a wasteful number, since it uses less digits than its factorization.

205150042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 205150042 is about 14323.0597988000. The cubic root of 205150042 is about 589.7806730498.

The spelling of 205150042 in words is "two hundred five million, one hundred fifty thousand, forty-two".