52815561 has 16 divisors (see below), whose sum is σ = 72057600. Its totient is φ = 34399568.

The previous prime is 52815559. The next prime is 52815589. The reversal of 52815561 is 16551825.

It is a cyclic number.

It is not a de Polignac number, because 52815561 - 2¹ = 52815559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52815361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30850 + ... + 32516.

It is an arithmetic number, because the mean of its divisors is an integer number (4503600).

Almost surely, 2^52815561 is an apocalyptic number.

It is an amenable number.

52815561 is a deficient number, since it is larger than the sum of its proper divisors (19242039).

52815561 is a wasteful number, since it uses less digits than its factorization.

52815561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908.

The product of its digits is 12000, while the sum is 33.

The square root of 52815561 is about 7267.4315270252. The cubic root of 52815561 is about 375.1923422173.

The spelling of 52815561 in words is "fifty-two million, eight hundred fifteen thousand, five hundred sixty-one".