204311311242 has 32 divisors (see below), whose sum is σ = 438753055104. Its totient is φ = 63194880000.

The previous prime is 204311311223. The next prime is 204311311273. The reversal of 204311311242 is 242113113402.

It is a super-2 number, since 2×204311311242² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14098759 + ... + 14113242.

It is an arithmetic number, because the mean of its divisors is an integer number (13711032972).

Almost surely, 2^204311311242 is an apocalyptic number.

204311311242 is an abundant number, since it is smaller than the sum of its proper divisors (234441743862).

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

204311311242 is a wasteful number, since it uses less digits than its factorization.

204311311242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28212094.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 204311311242 its reverse (242113113402), we get a palindrome (446424424644).

The spelling of 204311311242 in words is "two hundred four billion, three hundred eleven million, three hundred eleven thousand, two hundred forty-two".