205550043231 has 32 divisors (see below), whose sum is σ = 300974480128. Its totient is φ = 124013514240.

The previous prime is 205550043229. The next prime is 205550043233. The reversal of 205550043231 is 132340055502.

It is an interprime number because it is at equal distance from previous prime (205550043229) and next prime (205550043233).

It is not a de Polignac number, because 205550043231 - 2¹ = 205550043229 is a prime.

It is a super-2 number, since 2×205550043231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205550043233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 364935 + ... + 737751.

It is an arithmetic number, because the mean of its divisors is an integer number (9405452504).

Almost surely, 2^205550043231 is an apocalyptic number.

205550043231 is a deficient number, since it is larger than the sum of its proper divisors (95424436897).

205550043231 is a wasteful number, since it uses less digits than its factorization.

205550043231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373111.

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 205550043231 its reverse (132340055502), we get a palindrome (337890098733).

The spelling of 205550043231 in words is "two hundred five billion, five hundred fifty million, forty-three thousand, two hundred thirty-one".