53021320015 has 4 divisors (see below), whose sum is σ = 63625584024. Its totient is φ = 42417056008.

The previous prime is 53021319961. The next prime is 53021320021. The reversal of 53021320015 is 51002312035.

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

It is a cyclic number.

It is not a de Polignac number, because 53021320015 - 2⁷ = 53021319887 is a prime.

It is a super-2 number, since 2×53021320015² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5302131997 + ... + 5302132006.

It is an arithmetic number, because the mean of its divisors is an integer number (15906396006).

Almost surely, 2^53021320015 is an apocalyptic number.

53021320015 is a deficient number, since it is larger than the sum of its proper divisors (10604264009).

53021320015 is a wasteful number, since it uses less digits than its factorization.

53021320015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10604264008.

The product of its (nonzero) digits is 900, while the sum is 22.

The spelling of 53021320015 in words is "fifty-three billion, twenty-one million, three hundred twenty thousand, fifteen".