5217060721 has 16 divisors (see below), whose sum is σ = 5522254848. Its totient is φ = 4918914000.

The previous prime is 5217060713. The next prime is 5217060731. The reversal of 5217060721 is 1270607125.

It is a cyclic number.

It is not a de Polignac number, because 5217060721 - 2³ = 5217060713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5217060701) 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, 449230 + ... + 460696.

It is an arithmetic number, because the mean of its divisors is an integer number (345140928).

Almost surely, 2^5217060721 is an apocalyptic number.

It is an amenable number.

5217060721 is a deficient number, since it is larger than the sum of its proper divisors (305194127).

5217060721 is a wasteful number, since it uses less digits than its factorization.

5217060721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11772.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 5217060721 is about 72229.2234556069. The cubic root of 5217060721 is about 1734.3708428117.

Adding to 5217060721 its reverse (1270607125), we get a palindrome (6487667846).

The spelling of 5217060721 in words is "five billion, two hundred seventeen million, sixty thousand, seven hundred twenty-one".