53000520021 has 8 divisors (see below), whose sum is σ = 78519288960. Its totient is φ = 35333679996.

The previous prime is 53000520017. The next prime is 53000520047. The reversal of 53000520021 is 12002500035.

It is a happy number.

It is not a de Polignac number, because 53000520021 - 2² = 53000520017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53000519976 and 53000520003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53000520091) by changing a digit.

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, 981491085 + ... + 981491138.

It is an arithmetic number, because the mean of its divisors is an integer number (9814911120).

Almost surely, 2^53000520021 is an apocalyptic number.

It is an amenable number.

53000520021 is a deficient number, since it is larger than the sum of its proper divisors (25518768939).

53000520021 is a wasteful number, since it uses less digits than its factorization.

53000520021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962982232 (or 1962982226 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The spelling of 53000520021 in words is "fifty-three billion, five hundred twenty thousand, twenty-one".