56281421 has 8 divisors (see below), whose sum is σ = 64440384. Its totient is φ = 48152160.

The previous prime is 56281411. The next prime is 56281429. The reversal of 56281421 is 12418265.

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

It is not a de Polignac number, because 56281421 - 2¹⁰ = 56280397 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56281429) 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, 3200 + ... + 11081.

It is an arithmetic number, because the mean of its divisors is an integer number (8055048).

Almost surely, 2^56281421 is an apocalyptic number.

It is an amenable number.

56281421 is a deficient number, since it is larger than the sum of its proper divisors (8158963).

56281421 is a wasteful number, since it uses less digits than its factorization.

56281421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14851.

The product of its digits is 3840, while the sum is 29.

The square root of 56281421 is about 7502.0944408878. The cubic root of 56281421 is about 383.2260457575.

Adding to 56281421 its reverse (12418265), we get a palindrome (68699686).

The spelling of 56281421 in words is "fifty-six million, two hundred eighty-one thousand, four hundred twenty-one".