53453421 has 12 divisors (see below), whose sum is σ = 88240672. Its totient is φ = 30544776.

The previous prime is 53453377. The next prime is 53453443. The reversal of 53453421 is 12435435.

It is not a de Polignac number, because 53453421 - 2¹⁹ = 52929133 is a prime.

It is a super-5 number, since 5×53453421⁵ (a number of 40 digits) contains 55555 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53453461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 424171 + ... + 424296.

Almost surely, 2^53453421 is an apocalyptic number.

It is an amenable number.

53453421 is a deficient number, since it is larger than the sum of its proper divisors (34787251).

53453421 is a wasteful number, since it uses less digits than its factorization.

53453421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848480 (or 848477 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 53453421 is about 7311.1846509304. The cubic root of 53453421 is about 376.6967168271.

Adding to 53453421 its reverse (12435435), we get a palindrome (65888856).

The spelling of 53453421 in words is "fifty-three million, four hundred fifty-three thousand, four hundred twenty-one".