205316545025 has 12 divisors (see below), whose sum is σ = 269568546732. Its totient is φ = 154591280640.

The previous prime is 205316545001. The next prime is 205316545073. The reversal of 205316545025 is 520545613502.

It can be written as a sum of positive squares in 6 ways, for example, as 5871237376 + 199445307649 = 76624^2 + 446593^2 .

It is not a de Polignac number, because 205316545025 - 2¹² = 205316540929 is a prime.

It is a super-2 number, since 2×205316545025² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205316545025.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 241548452 + ... + 241549301.

It is an arithmetic number, because the mean of its divisors is an integer number (22464045561).

Almost surely, 2^205316545025 is an apocalyptic number.

205316545025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205316545025 is a deficient number, since it is larger than the sum of its proper divisors (64252001707).

205316545025 is a wasteful number, since it uses less digits than its factorization.

205316545025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483097780 (or 483097775 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 205316545025 in words is "two hundred five billion, three hundred sixteen million, five hundred forty-five thousand, twenty-five".