205304100551 has 16 divisors (see below), whose sum is σ = 231216380928. Its totient is φ = 180601089600.

The previous prime is 205304100541. The next prime is 205304100553. The reversal of 205304100551 is 155001403502.

It is a de Polignac number, because none of the positive numbers 2^k-205304100551 is a prime.

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 205304100551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205304100553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4177715 + ... + 4226571.

It is an arithmetic number, because the mean of its divisors is an integer number (14451023808).

Almost surely, 2^205304100551 is an apocalyptic number.

205304100551 is a deficient number, since it is larger than the sum of its proper divisors (25912280377).

205304100551 is a wasteful number, since it uses less digits than its factorization.

205304100551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61222.

The product of its (nonzero) digits is 3000, while the sum is 26.

The spelling of 205304100551 in words is "two hundred five billion, three hundred four million, one hundred thousand, five hundred fifty-one".