204002551251 has 12 divisors (see below), whose sum is σ = 297373750960. Its totient is φ = 134753978160.

The previous prime is 204002551237. The next prime is 204002551253. The reversal of 204002551251 is 152155200402.

204002551251 is a `hidden beast` number, since 2 + 0 + 400 + 2 + 5 + 5 + 1 + 251 = 666.

It is not a de Polignac number, because 204002551251 - 2¹¹ = 204002549203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204002551253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103975855 + ... + 103977816.

Almost surely, 2^204002551251 is an apocalyptic number.

204002551251 is a deficient number, since it is larger than the sum of its proper divisors (93371199709).

204002551251 is a wasteful number, since it uses less digits than its factorization.

204002551251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207953786 (or 207953783 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 204002551251 its reverse (152155200402), we get a palindrome (356157751653).

The spelling of 204002551251 in words is "two hundred four billion, two million, five hundred fifty-one thousand, two hundred fifty-one".