53103221521 has 16 divisors (see below), whose sum is σ = 64300594176. Its totient is φ = 42812084736.

The previous prime is 53103221489. The next prime is 53103221531. The reversal of 53103221521 is 12512230135.

53103221521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 53103221521 - 2⁵ = 53103221489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53103221531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44085 + ... + 328861.

It is an arithmetic number, because the mean of its divisors is an integer number (4018787136).

Almost surely, 2^53103221521 is an apocalyptic number.

It is an amenable number.

53103221521 is a deficient number, since it is larger than the sum of its proper divisors (11197372655).

53103221521 is a wasteful number, since it uses less digits than its factorization.

53103221521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286368.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 53103221521 its reverse (12512230135), we get a palindrome (65615451656).

The spelling of 53103221521 in words is "fifty-three billion, one hundred three million, two hundred twenty-one thousand, five hundred twenty-one".