53231617 has 4 divisors (see below), whose sum is σ = 55067220. Its totient is φ = 51396016.

The previous prime is 53231609. The next prime is 53231621. The reversal of 53231617 is 71613235.

It is a Cunningham number, because it is equal to 7296²+1.

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 27920656 + 25310961 = 5284^2 + 5031^2 .

It is a cyclic number.

It is not a de Polignac number, because 53231617 - 2³ = 53231609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53231627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 917758 + ... + 917815.

It is an arithmetic number, because the mean of its divisors is an integer number (13766805).

It is a Proth number, since it is equal to 3249 ⋅ 2¹⁴ + 1 and 3249 < 2¹⁴.

Almost surely, 2^53231617 is an apocalyptic number.

It is an amenable number.

53231617 is a deficient number, since it is larger than the sum of its proper divisors (1835603).

53231617 is a wasteful number, since it uses less digits than its factorization.

53231617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835602.

The product of its digits is 3780, while the sum is 28.

The square root of 53231617 is about 7296.0000685307. Note that the first 4 decimals coincide. The cubic root of 53231617 is about 376.1749624276.

The spelling of 53231617 in words is "fifty-three million, two hundred thirty-one thousand, six hundred seventeen".