5215166561 has 8 divisors (see below), whose sum is σ = 5694500448. Its totient is φ = 4736704000.

The previous prime is 5215166543. The next prime is 5215166587. The reversal of 5215166561 is 1656615125.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5215166561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5215166861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205280 + ... + 229281.

It is an arithmetic number, because the mean of its divisors is an integer number (711812556).

Almost surely, 2^5215166561 is an apocalyptic number.

It is an amenable number.

5215166561 is a deficient number, since it is larger than the sum of its proper divisors (479333887).

5215166561 is a wasteful number, since it uses less digits than its factorization.

5215166561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435663.

The product of its digits is 54000, while the sum is 38.

The square root of 5215166561 is about 72216.1101209419. The cubic root of 5215166561 is about 1734.1609178677.

The spelling of 5215166561 in words is "five billion, two hundred fifteen million, one hundred sixty-six thousand, five hundred sixty-one".