205143353025 has 96 divisors (see below), whose sum is σ = 378162879360. Its totient is φ = 97431828480.

The previous prime is 205143353021. The next prime is 205143353057. The reversal of 205143353025 is 520353341502.

It is not a de Polignac number, because 205143353025 - 2² = 205143353021 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205143353021) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 49394349 + ... + 49398501.

It is an arithmetic number, because the mean of its divisors is an integer number (3939196660).

Almost surely, 2^205143353025 is an apocalyptic number.

205143353025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205143353025 is a deficient number, since it is larger than the sum of its proper divisors (173019526335).

205143353025 is a wasteful number, since it uses less digits than its factorization.

205143353025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5955 (or 5950 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 33.

Adding to 205143353025 its reverse (520353341502), we get a palindrome (725496694527).

The spelling of 205143353025 in words is "two hundred five billion, one hundred forty-three million, three hundred fifty-three thousand, twenty-five".