205315431320 has 16 divisors (see below), whose sum is σ = 461959720560. Its totient is φ = 82126172512.

The previous prime is 205315431313. The next prime is 205315431337. The reversal of 205315431320 is 23134513502.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2566442852 + ... + 2566442931.

It is an arithmetic number, because the mean of its divisors is an integer number (28872482535).

Almost surely, 2^205315431320 is an apocalyptic number.

205315431320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205315431320 is an abundant number, since it is smaller than the sum of its proper divisors (256644289240).

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

205315431320 is a wasteful number, since it uses less digits than its factorization.

205315431320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5132885794 (or 5132885790 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 205315431320 its reverse (23134513502), we get a palindrome (228449944822).

The spelling of 205315431320 in words is "two hundred five billion, three hundred fifteen million, four hundred thirty-one thousand, three hundred twenty".