205155300423 has 16 divisors (see below), whose sum is σ = 277839910400. Its totient is φ = 134630907840.

The previous prime is 205155300421. The next prime is 205155300461. The reversal of 205155300423 is 324003551502.

It is not a de Polignac number, because 205155300423 - 2¹ = 205155300421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205155300421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1229158 + ... + 1386051.

It is an arithmetic number, because the mean of its divisors is an integer number (17364994400).

Almost surely, 2^205155300423 is an apocalyptic number.

205155300423 is a deficient number, since it is larger than the sum of its proper divisors (72684609977).

205155300423 is a wasteful number, since it uses less digits than its factorization.

205155300423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2615622.

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

Adding to 205155300423 its reverse (324003551502), we get a palindrome (529158851925).

The spelling of 205155300423 in words is "two hundred five billion, one hundred fifty-five million, three hundred thousand, four hundred twenty-three".