52081146521 has 4 divisors (see below), whose sum is σ = 52368887844. Its totient is φ = 51793405200.

The previous prime is 52081146517. The next prime is 52081146539. The reversal of 52081146521 is 12564118025.

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 11533686025 + 40547460496 = 107395^2 + 201364^2 .

It is a cyclic number.

It is not a de Polignac number, because 52081146521 - 2² = 52081146517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52081146511) 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, 143870390 + ... + 143870751.

It is an arithmetic number, because the mean of its divisors is an integer number (13092221961).

Almost surely, 2^52081146521 is an apocalyptic number.

It is an amenable number.

52081146521 is a deficient number, since it is larger than the sum of its proper divisors (287741323).

52081146521 is a wasteful number, since it uses less digits than its factorization.

52081146521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287741322.

The product of its (nonzero) digits is 19200, while the sum is 35.

The spelling of 52081146521 in words is "fifty-two billion, eighty-one million, one hundred forty-six thousand, five hundred twenty-one".