54521253515 has 4 divisors (see below), whose sum is σ = 65425504224. Its totient is φ = 43617002808.

The previous prime is 54521253473. The next prime is 54521253517. The reversal of 54521253515 is 51535212545.

54521253515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 54521253515 - 2¹⁴ = 54521237131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54521253517) 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, 5452125347 + ... + 5452125356.

It is an arithmetic number, because the mean of its divisors is an integer number (16356376056).

Almost surely, 2^54521253515 is an apocalyptic number.

54521253515 is a deficient number, since it is larger than the sum of its proper divisors (10904250709).

54521253515 is a wasteful number, since it uses less digits than its factorization.

54521253515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10904250708.

The product of its digits is 150000, while the sum is 38.

The spelling of 54521253515 in words is "fifty-four billion, five hundred twenty-one million, two hundred fifty-three thousand, five hundred fifteen".