204105061731 has 4 divisors (see below), whose sum is σ = 272140082312. Its totient is φ = 136070041152.

The previous prime is 204105061697. The next prime is 204105061739. The reversal of 204105061731 is 137160501402.

204105061731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 204105061731 - 2⁷ = 204105061603 is a prime.

It is a super-2 number, since 2×204105061731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204105061739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34017510286 + ... + 34017510291.

It is an arithmetic number, because the mean of its divisors is an integer number (68035020578).

Almost surely, 2^204105061731 is an apocalyptic number.

204105061731 is a deficient number, since it is larger than the sum of its proper divisors (68035020581).

204105061731 is an equidigital number, since it uses as much as digits as its factorization.

204105061731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68035020580.

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 204105061731 in words is "two hundred four billion, one hundred five million, sixty-one thousand, seven hundred thirty-one".