54020521013 has 4 divisors (see below), whose sum is σ = 54025759308. Its totient is φ = 54015282720.

The previous prime is 54020520979. The next prime is 54020521073. The reversal of 54020521013 is 31012502045.

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 34396153444 + 19624367569 = 185462^2 + 140087^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54020521013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54020521013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54020521073) 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, 2603648 + ... + 2624313.

It is an arithmetic number, because the mean of its divisors is an integer number (13506439827).

Almost surely, 2^54020521013 is an apocalyptic number.

It is an amenable number.

54020521013 is a deficient number, since it is larger than the sum of its proper divisors (5238295).

54020521013 is a wasteful number, since it uses less digits than its factorization.

54020521013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5238294.

The product of its (nonzero) digits is 1200, while the sum is 23.

The spelling of 54020521013 in words is "fifty-four billion, twenty million, five hundred twenty-one thousand, thirteen".