53103221520 has 80 divisors (see below), whose sum is σ = 168448391232. Its totient is φ = 13831534080.

The previous prime is 53103221489. The next prime is 53103221531. The reversal of 53103221520 is 2512230135.

It is a happy number.

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

It is a super-2 number, since 2×53103221520² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 15 ways as a sum of consecutive naturals, for example, 2562511 + ... + 2583150.

Almost surely, 2^53103221520 is an apocalyptic number.

It is an amenable number.

53103221520 is an abundant number, since it is smaller than the sum of its proper divisors (115345169712).

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

53103221520 is a wasteful number, since it uses less digits than its factorization.

53103221520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5145720 (or 5145714 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 53103221520 its reverse (2512230135), we get a palindrome (55615451655).

The spelling of 53103221520 in words is "fifty-three billion, one hundred three million, two hundred twenty-one thousand, five hundred twenty".