205634242 has 8 divisors (see below), whose sum is σ = 336492432. Its totient is φ = 93470100.

The previous prime is 205634203. The next prime is 205634249. The reversal of 205634242 is 242436502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 205634242.

It is not an unprimeable number, because it can be changed into a prime (205634249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4673484 + ... + 4673527.

It is an arithmetic number, because the mean of its divisors is an integer number (42061554).

Almost surely, 2^205634242 is an apocalyptic number.

205634242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

205634242 is a deficient number, since it is larger than the sum of its proper divisors (130858190).

205634242 is a wasteful number, since it uses less digits than its factorization.

205634242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9347024.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 205634242 is about 14339.9526498521. The cubic root of 205634242 is about 590.2443132586.

The spelling of 205634242 in words is "two hundred five million, six hundred thirty-four thousand, two hundred forty-two".