204421310031651 has 16 divisors (see below), whose sum is σ = 272628560298240. Its totient is φ = 136247470536800.

The previous prime is 204421310031637. The next prime is 204421310031661. The reversal of 204421310031651 is 156130013124402.

It is a cyclic number.

It is not a de Polignac number, because 204421310031651 - 2¹¹ = 204421310029603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204421310031611) 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, 208693036 + ... + 209670278.

It is an arithmetic number, because the mean of its divisors is an integer number (17039285018640).

Almost surely, 2^{204421310031651} is an apocalyptic number.

204421310031651 is a deficient number, since it is larger than the sum of its proper divisors (68207250266589).

204421310031651 is a wasteful number, since it uses less digits than its factorization.

204421310031651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994266.

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 204421310031651 in words is "two hundred four trillion, four hundred twenty-one billion, three hundred ten million, thirty-one thousand, six hundred fifty-one".