200421550321555 has 16 divisors (see below), whose sum is σ = 241149494960640. Its totient is φ = 159908331359232.

The previous prime is 200421550321507. The next prime is 200421550321591. The reversal of 200421550321555 is 555123055124002.

It is a cyclic number.

It is not a de Polignac number, because 200421550321555 - 2¹⁵ = 200421550288787 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2429619 + ... + 20167948.

It is an arithmetic number, because the mean of its divisors is an integer number (15071843435040).

Almost surely, 2^{200421550321555} is an apocalyptic number.

200421550321555 is a deficient number, since it is larger than the sum of its proper divisors (40727944639085).

200421550321555 is a wasteful number, since it uses less digits than its factorization.

200421550321555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22602318.

The product of its (nonzero) digits is 300000, while the sum is 40.

The spelling of 200421550321555 in words is "two hundred trillion, four hundred twenty-one billion, five hundred fifty million, three hundred twenty-one thousand, five hundred fifty-five".