53225040221 has 4 divisors (see below), whose sum is σ = 53247490944. Its totient is φ = 53202589500.

The previous prime is 53225040181. The next prime is 53225040241. The reversal of 53225040221 is 12204052235.

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: 12204052235 = 5 ⋅2440810447.

It is a cyclic number.

It is not a de Polignac number, because 53225040221 - 2³⁴ = 36045171037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53225040241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11221805 + ... + 11226546.

It is an arithmetic number, because the mean of its divisors is an integer number (13311872736).

Almost surely, 2^53225040221 is an apocalyptic number.

It is an amenable number.

53225040221 is a deficient number, since it is larger than the sum of its proper divisors (22450723).

53225040221 is a wasteful number, since it uses less digits than its factorization.

53225040221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22450722.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 53225040221 its reverse (12204052235), we get a palindrome (65429092456).

The spelling of 53225040221 in words is "fifty-three billion, two hundred twenty-five million, forty thousand, two hundred twenty-one".