204243225225531 has 32 divisors (see below), whose sum is σ = 285979794766848. Its totient is φ = 129410071739520.

The previous prime is 204243225225443. The next prime is 204243225225563. The reversal of 204243225225531 is 135522522342402.

It is not a de Polignac number, because 204243225225531 - 2¹⁵ = 204243225192763 is a prime.

It is a super-2 number, since 2×204243225225531² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204243225225031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 713004025 + ... + 713290421.

It is an arithmetic number, because the mean of its divisors is an integer number (8936868586464).

Almost surely, 2^{204243225225531} is an apocalyptic number.

204243225225531 is a deficient number, since it is larger than the sum of its proper divisors (81736569541317).

204243225225531 is a wasteful number, since it uses less digits than its factorization.

204243225225531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352411.

The product of its (nonzero) digits is 1152000, while the sum is 42.

Adding to 204243225225531 its reverse (135522522342402), we get a palindrome (339765747567933).

The spelling of 204243225225531 in words is "two hundred four trillion, two hundred forty-three billion, two hundred twenty-five million, two hundred twenty-five thousand, five hundred thirty-one".