53217414721 has 9 divisors (see below), whose sum is σ = 53451201033. Its totient is φ = 52984649520.

The previous prime is 53217414683. The next prime is 53217414727. The reversal of 53217414721 is 12741471235.

The square root of 53217414721 is 230689.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 14911096321 + 38306318400 = 122111^2 + 195720^2 .

It is not a de Polignac number, because 53217414721 - 2⁹ = 53217414209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53217414727) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 80510131 + ... + 80510791.

It is an arithmetic number, because the mean of its divisors is an integer number (5939022337).

Almost surely, 2^53217414721 is an apocalyptic number.

53217414721 is the 230689-th square number.

53217414721 is the 115345-th centered octagonal number.

It is an amenable number.

53217414721 is a deficient number, since it is larger than the sum of its proper divisors (233786312).

53217414721 is an frugal number, since it uses more digits than its factorization.

53217414721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020 (or 1010 counting only the distinct ones).

The product of its digits is 47040, while the sum is 37.

Adding to 53217414721 its reverse (12741471235), we get a palindrome (65958885956).

The spelling of 53217414721 in words is "fifty-three billion, two hundred seventeen million, four hundred fourteen thousand, seven hundred twenty-one".