53213421 has 8 divisors (see below), whose sum is σ = 74036160. Its totient is φ = 33933152.

The previous prime is 53213401. The next prime is 53213429. The reversal of 53213421 is 12431235.

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 53213421 - 2⁵ = 53213389 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53213429) 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, 385536 + ... + 385673.

It is an arithmetic number, because the mean of its divisors is an integer number (9254520).

Almost surely, 2^53213421 is an apocalyptic number.

It is an amenable number.

53213421 is a deficient number, since it is larger than the sum of its proper divisors (20822739).

53213421 is a wasteful number, since it uses less digits than its factorization.

53213421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771235.

The product of its digits is 720, while the sum is 21.

The square root of 53213421 is about 7294.7529773118. The cubic root of 53213421 is about 376.1320952991.

Adding to 53213421 its reverse (12431235), we get a palindrome (65644656).

The spelling of 53213421 in words is "fifty-three million, two hundred thirteen thousand, four hundred twenty-one".