53320221505 has 4 divisors (see below), whose sum is σ = 63984265812. Its totient is φ = 42656177200.

The previous prime is 53320221473. The next prime is 53320221509. The reversal of 53320221505 is 50512202335.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5406513841 + 47913707664 = 73529^2 + 218892^2 .

It is not a de Polignac number, because 53320221505 - 2⁵ = 53320221473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53320221509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5332022146 + ... + 5332022155.

It is an arithmetic number, because the mean of its divisors is an integer number (15996066453).

Almost surely, 2^53320221505 is an apocalyptic number.

It is an amenable number.

53320221505 is a deficient number, since it is larger than the sum of its proper divisors (10664044307).

53320221505 is a wasteful number, since it uses less digits than its factorization.

53320221505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10664044306.

The product of its (nonzero) digits is 9000, while the sum is 28.

The spelling of 53320221505 in words is "fifty-three billion, three hundred twenty million, two hundred twenty-one thousand, five hundred five".