205131551043 has 8 divisors (see below), whose sum is σ = 275320051456. Its totient is φ = 135848709000.

The previous prime is 205131551039. The next prime is 205131551063. The reversal of 205131551043 is 340155131502.

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

It is not a de Polignac number, because 205131551043 - 2² = 205131551039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205131551043.

It is not an unprimeable number, because it can be changed into a prime (205131551003) 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, 226414063 + ... + 226414968.

It is an arithmetic number, because the mean of its divisors is an integer number (34415006432).

Almost surely, 2^205131551043 is an apocalyptic number.

205131551043 is a deficient number, since it is larger than the sum of its proper divisors (70188500413).

205131551043 is a wasteful number, since it uses less digits than its factorization.

205131551043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452829185.

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 205131551043 its reverse (340155131502), we get a palindrome (545286682545).

The spelling of 205131551043 in words is "two hundred five billion, one hundred thirty-one million, five hundred fifty-one thousand, forty-three".