205125106251 has 32 divisors (see below), whose sum is σ = 298196946432. Its totient is φ = 124670891520.

The previous prime is 205125106231. The next prime is 205125106273. The reversal of 205125106251 is 152601521502.

It is not a de Polignac number, because 205125106251 - 2²⁹ = 204588235339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205125106231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1164946 + ... + 1329416.

It is an arithmetic number, because the mean of its divisors is an integer number (9318654576).

Almost surely, 2^205125106251 is an apocalyptic number.

205125106251 is a deficient number, since it is larger than the sum of its proper divisors (93071840181).

205125106251 is a wasteful number, since it uses less digits than its factorization.

205125106251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164883.

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 205125106251 its reverse (152601521502), we get a palindrome (357726627753).

The spelling of 205125106251 in words is "two hundred five billion, one hundred twenty-five million, one hundred six thousand, two hundred fifty-one".