53340421 has 4 divisors (see below), whose sum is σ = 54782092. Its totient is φ = 51898752.

The previous prime is 53340409. The next prime is 53340431. The reversal of 53340421 is 12404335.

53340421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31203396 + 22137025 = 5586^2 + 4705^2 .

It is a cyclic number.

It is not a de Polignac number, because 53340421 - 2¹⁹ = 52816133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53340392 and 53340401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53340401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720780 + ... + 720853.

It is an arithmetic number, because the mean of its divisors is an integer number (13695523).

Almost surely, 2^53340421 is an apocalyptic number.

It is an amenable number.

53340421 is a deficient number, since it is larger than the sum of its proper divisors (1441671).

53340421 is a wasteful number, since it uses less digits than its factorization.

53340421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441670.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 53340421 is about 7303.4526766455. The cubic root of 53340421 is about 376.4310851881.

Adding to 53340421 its reverse (12404335), we get a palindrome (65744756).

The spelling of 53340421 in words is "fifty-three million, three hundred forty thousand, four hundred twenty-one".