53565421 has 8 divisors (see below), whose sum is σ = 65926784. Its totient is φ = 42381360.

The previous prime is 53565409. The next prime is 53565431. The reversal of 53565421 is 12456535.

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

It is not a de Polignac number, because 53565421 - 2⁷ = 53565293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53565431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294225 + ... + 294406.

It is an arithmetic number, because the mean of its divisors is an integer number (8240848).

Almost surely, 2^53565421 is an apocalyptic number.

It is an amenable number.

53565421 is a deficient number, since it is larger than the sum of its proper divisors (12361363).

53565421 is a wasteful number, since it uses less digits than its factorization.

53565421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588651.

The product of its digits is 18000, while the sum is 31.

The square root of 53565421 is about 7318.8401403501. The cubic root of 53565421 is about 376.9596285926.

It can be divided in two parts, 535 and 65421, that added together give a palindrome (65956).

The spelling of 53565421 in words is "fifty-three million, five hundred sixty-five thousand, four hundred twenty-one".