53240340533 has 4 divisors (see below), whose sum is σ = 53304719040. Its totient is φ = 53175962028.

The previous prime is 53240340523. The next prime is 53240340547. The reversal of 53240340533 is 33504304235.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33504304235 = 5 ⋅6700860847.

It is a cyclic number.

It is not a de Polignac number, because 53240340533 - 2¹⁴ = 53240324149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53240340533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53240340523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32188013 + ... + 32189666.

It is an arithmetic number, because the mean of its divisors is an integer number (13326179760).

Almost surely, 2^53240340533 is an apocalyptic number.

It is an amenable number.

53240340533 is a deficient number, since it is larger than the sum of its proper divisors (64378507).

53240340533 is an equidigital number, since it uses as much as digits as its factorization.

53240340533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64378506.

The product of its (nonzero) digits is 64800, while the sum is 32.

Adding to 53240340533 its reverse (33504304235), we get a palindrome (86744644768).

The spelling of 53240340533 in words is "fifty-three billion, two hundred forty million, three hundred forty thousand, five hundred thirty-three".