205661442 has 16 divisors (see below), whose sum is σ = 470083392. Its totient is φ = 58760400.

The previous prime is 205661441. The next prime is 205661459. The reversal of 205661442 is 244166502.

It is not an unprimeable number, because it can be changed into a prime (205661441) 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, 2448309 + ... + 2448392.

It is an arithmetic number, because the mean of its divisors is an integer number (29380212).

Almost surely, 2^205661442 is an apocalyptic number.

205661442 is an abundant number, since it is smaller than the sum of its proper divisors (264421950).

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

205661442 is a wasteful number, since it uses less digits than its factorization.

205661442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896713.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 205661442 is about 14340.9010177185. The cubic root of 205661442 is about 590.2703367090.

The spelling of 205661442 in words is "two hundred five million, six hundred sixty-one thousand, four hundred forty-two".