53225521 has 4 divisors (see below), whose sum is σ = 56356452. Its totient is φ = 50094592.

The previous prime is 53225509. The next prime is 53225533. The reversal of 53225521 is 12552235.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12552235 = 5 ⋅2510447.

It is an interprime number because it is at equal distance from previous prime (53225509) and next prime (53225533).

It can be written as a sum of positive squares in 2 ways, for example, as 28772496 + 24453025 = 5364^2 + 4945^2 .

It is a cyclic number.

It is not a de Polignac number, because 53225521 - 2¹¹ = 53223473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53225561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1565440 + ... + 1565473.

It is an arithmetic number, because the mean of its divisors is an integer number (14089113).

Almost surely, 2^53225521 is an apocalyptic number.

It is an amenable number.

53225521 is a deficient number, since it is larger than the sum of its proper divisors (3130931).

53225521 is a wasteful number, since it uses less digits than its factorization.

53225521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130930.

The product of its digits is 3000, while the sum is 25.

The square root of 53225521 is about 7295.5822934157. The cubic root of 53225521 is about 376.1606022268.

Adding to 53225521 its reverse (12552235), we get a palindrome (65777756).

The spelling of 53225521 in words is "fifty-three million, two hundred twenty-five thousand, five hundred twenty-one".