205323143025 has 288 divisors, whose sum is σ = 484127013888. Its totient is φ = 75336307200.

The previous prime is 205323142967. The next prime is 205323143027. The reversal of 205323143025 is 520341323502.

It is not a de Polignac number, because 205323143025 - 2⁶ = 205323142961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205323142983 and 205323143001.

It is not an unprimeable number, because it can be changed into a prime (205323143027) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 12078582 + ... + 12095568.

It is an arithmetic number, because the mean of its divisors is an integer number (1680996576).

Almost surely, 2^205323143025 is an apocalyptic number.

205323143025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205323143025 is an abundant number, since it is smaller than the sum of its proper divisors (278803870863).

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

205323143025 is a wasteful number, since it uses less digits than its factorization.

205323143025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17061 (or 17049 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 205323143025 its reverse (520341323502), we get a palindrome (725664466527).

The spelling of 205323143025 in words is "two hundred five billion, three hundred twenty-three million, one hundred forty-three thousand, twenty-five".