204422541520 has 80 divisors (see below), whose sum is σ = 480096896832. Its totient is φ = 80942561280.

The previous prime is 204422541493. The next prime is 204422541551. The reversal of 204422541520 is 25145224402.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×204422541520² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7317499 + ... + 7345381.

Almost surely, 2^204422541520 is an apocalyptic number.

204422541520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204422541520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240048448416).

204422541520 is an abundant number, since it is smaller than the sum of its proper divisors (275674355312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204422541520 is a wasteful number, since it uses less digits than its factorization.

204422541520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28820 (or 28814 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 31.

Adding to 204422541520 its reverse (25145224402), we get a palindrome (229567765922).

The spelling of 204422541520 in words is "two hundred four billion, four hundred twenty-two million, five hundred forty-one thousand, five hundred twenty".