205323614551 has 16 divisors (see below), whose sum is σ = 237224845440. Its totient is φ = 175748836320.

The previous prime is 205323614537. The next prime is 205323614569. The reversal of 205323614551 is 155416323502.

It is a cyclic number.

It is not a de Polignac number, because 205323614551 - 2⁷ = 205323614423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205323614551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205323614581) 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, 2979460 + ... + 3047593.

It is an arithmetic number, because the mean of its divisors is an integer number (14826552840).

Almost surely, 2^205323614551 is an apocalyptic number.

205323614551 is a deficient number, since it is larger than the sum of its proper divisors (31901230889).

205323614551 is a wasteful number, since it uses less digits than its factorization.

205323614551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6027246.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 205323614551 in words is "two hundred five billion, three hundred twenty-three million, six hundred fourteen thousand, five hundred fifty-one".