204341515581 has 8 divisors (see below), whose sum is σ = 311377547584. Its totient is φ = 116766580320.

The previous prime is 204341515559. The next prime is 204341515607. The reversal of 204341515581 is 185515143402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 204341515581 - 2¹³ = 204341507389 is a prime.

It is a super-2 number, since 2×204341515581² (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 (204341515181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4865274160 + ... + 4865274201.

It is an arithmetic number, because the mean of its divisors is an integer number (38922193448).

Almost surely, 2^204341515581 is an apocalyptic number.

204341515581 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

204341515581 is a deficient number, since it is larger than the sum of its proper divisors (107036032003).

204341515581 is an equidigital number, since it uses as much as digits as its factorization.

204341515581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9730548371.

The product of its (nonzero) digits is 96000, while the sum is 39.

Adding to 204341515581 its reverse (185515143402), we get a palindrome (389856658983).

The spelling of 204341515581 in words is "two hundred four billion, three hundred forty-one million, five hundred fifteen thousand, five hundred eighty-one".