205051255502 has 4 divisors (see below), whose sum is σ = 307576883256. Its totient is φ = 102525627750.

The previous prime is 205051255319. The next prime is 205051255543. The reversal of 205051255502 is 205552150502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 205552150502 = 2 ⋅102776075251.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51262813874 + ... + 51262813877.

It is an arithmetic number, because the mean of its divisors is an integer number (76894220814).

Almost surely, 2^205051255502 is an apocalyptic number.

205051255502 is a deficient number, since it is larger than the sum of its proper divisors (102525627754).

205051255502 is a wasteful number, since it uses less digits than its factorization.

205051255502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102525627753.

The product of its (nonzero) digits is 25000, while the sum is 32.

The spelling of 205051255502 in words is "two hundred five billion, fifty-one million, two hundred fifty-five thousand, five hundred two".