200557055621 has 4 divisors (see below), whose sum is σ = 215984521452. Its totient is φ = 185129589792.

The previous prime is 200557055581. The next prime is 200557055627. The reversal of 200557055621 is 126550755002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71083024996 + 129474030625 = 266614^2 + 359825^2 .

It is a cyclic number.

It is not a de Polignac number, because 200557055621 - 2¹⁴ = 200557039237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200557055627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7713732896 + ... + 7713732921.

It is an arithmetic number, because the mean of its divisors is an integer number (53996130363).

Almost surely, 2^200557055621 is an apocalyptic number.

It is an amenable number.

200557055621 is a deficient number, since it is larger than the sum of its proper divisors (15427465831).

200557055621 is a wasteful number, since it uses less digits than its factorization.

200557055621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15427465830.

The product of its (nonzero) digits is 105000, while the sum is 38.

The spelling of 200557055621 in words is "two hundred billion, five hundred fifty-seven million, fifty-five thousand, six hundred twenty-one".