201530055520 has 48 divisors (see below), whose sum is σ = 476165420640. Its totient is φ = 80603444224.

The previous prime is 201530055491. The next prime is 201530055557. The reversal of 201530055520 is 25550035102.

It is a super-2 number, since 2×201530055520² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1565109 + ... + 1688971.

It is an arithmetic number, because the mean of its divisors is an integer number (9920112930).

Almost surely, 2^201530055520 is an apocalyptic number.

201530055520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201530055520 is an abundant number, since it is smaller than the sum of its proper divisors (274635365120).

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

201530055520 is a wasteful number, since it uses less digits than its factorization.

201530055520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134047 (or 134039 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

The spelling of 201530055520 in words is "two hundred one billion, five hundred thirty million, fifty-five thousand, five hundred twenty".