53422021 has 4 divisors (see below), whose sum is σ = 55145344. Its totient is φ = 51698700.

The previous prime is 53422003. The next prime is 53422027. The reversal of 53422021 is 12022435.

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.

It is not a de Polignac number, because 53422021 - 2¹⁵ = 53389253 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 53422021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53422027) 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, 861615 + ... + 861676.

It is an arithmetic number, because the mean of its divisors is an integer number (13786336).

Almost surely, 2^53422021 is an apocalyptic number.

It is an amenable number.

53422021 is a deficient number, since it is larger than the sum of its proper divisors (1723323).

53422021 is a wasteful number, since it uses less digits than its factorization.

53422021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723322.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 53422021 is about 7309.0369406646. The cubic root of 53422021 is about 376.6229417314.

Adding to 53422021 its reverse (12022435), we get a palindrome (65444456).

The spelling of 53422021 in words is "fifty-three million, four hundred twenty-two thousand, twenty-one".