53522421 has 16 divisors (see below), whose sum is σ = 73647360. Its totient is φ = 34557120.

The previous prime is 53522419. The next prime is 53522459. The reversal of 53522421 is 12422535.

It is not a de Polignac number, because 53522421 - 2¹ = 53522419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53522391 and 53522400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53522621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10431 + ... + 14691.

It is an arithmetic number, because the mean of its divisors is an integer number (4602960).

Almost surely, 2^53522421 is an apocalyptic number.

It is an amenable number.

53522421 is a deficient number, since it is larger than the sum of its proper divisors (20124939).

53522421 is a wasteful number, since it uses less digits than its factorization.

53522421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4396.

The product of its digits is 2400, while the sum is 24.

The square root of 53522421 is about 7315.9019266253. The cubic root of 53522421 is about 376.8587326350.

Adding to 53522421 its reverse (12422535), we get a palindrome (65944956).

The spelling of 53522421 in words is "fifty-three million, five hundred twenty-two thousand, four hundred twenty-one".