53853421 has 4 divisors (see below), whose sum is σ = 54356832. Its totient is φ = 53350012.

The previous prime is 53853379. The next prime is 53853469. The reversal of 53853421 is 12435835.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12435835 = 5 ⋅2487167.

It is a cyclic number.

It is not a de Polignac number, because 53853421 - 2²¹ = 51756269 is a prime.

It is a super-5 number, since 5×53853421⁵ (a number of 40 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53853221) 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 3 ways as a sum of consecutive naturals, for example, 251545 + ... + 251758.

It is an arithmetic number, because the mean of its divisors is an integer number (13589208).

Almost surely, 2^53853421 is an apocalyptic number.

It is an amenable number.

53853421 is a deficient number, since it is larger than the sum of its proper divisors (503411).

53853421 is a wasteful number, since it uses less digits than its factorization.

53853421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503410.

The product of its digits is 14400, while the sum is 31.

The square root of 53853421 is about 7338.4890134141. The cubic root of 53853421 is about 377.6340088236.

The spelling of 53853421 in words is "fifty-three million, eight hundred fifty-three thousand, four hundred twenty-one".