53403421 has 8 divisors (see below), whose sum is σ = 56300544. Its totient is φ = 50579760.

The previous prime is 53403419. The next prime is 53403451. The reversal of 53403421 is 12430435.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53403421 - 2¹ = 53403419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53403392 and 53403401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53403451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16870 + ... + 19783.

It is an arithmetic number, because the mean of its divisors is an integer number (7037568).

Almost surely, 2^53403421 is an apocalyptic number.

It is an amenable number.

53403421 is a deficient number, since it is larger than the sum of its proper divisors (2897123).

53403421 is a wasteful number, since it uses less digits than its factorization.

53403421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36731.

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

The square root of 53403421 is about 7307.7644324376. The cubic root of 53403421 is about 376.5792269252.

Adding to 53403421 its reverse (12430435), we get a palindrome (65833856).

It can be divided in two parts, 53403 and 421, that added together give a square (53824 = 232²).

The spelling of 53403421 in words is "fifty-three million, four hundred three thousand, four hundred twenty-one".