204051205501 has 32 divisors (see below), whose sum is σ = 241278121728. Its totient is φ = 170123466240.

The previous prime is 204051205483. The next prime is 204051205507. The reversal of 204051205501 is 105502150402.

It is not a de Polignac number, because 204051205501 - 2⁹ = 204051204989 is a prime.

It is a super-2 number, since 2×204051205501² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204051205507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70677880 + ... + 70680766.

It is an arithmetic number, because the mean of its divisors is an integer number (7539941304).

Almost surely, 2^204051205501 is an apocalyptic number.

It is an amenable number.

204051205501 is a deficient number, since it is larger than the sum of its proper divisors (37226916227).

204051205501 is a wasteful number, since it uses less digits than its factorization.

204051205501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5941.

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 204051205501 its reverse (105502150402), we get a palindrome (309553355903).

The spelling of 204051205501 in words is "two hundred four billion, fifty-one million, two hundred five thousand, five hundred one".