56426521 has 8 divisors (see below), whose sum is σ = 59094720. Its totient is φ = 53776272.

The previous prime is 56426483. The next prime is 56426533. The reversal of 56426521 is 12562465.

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 56426521 - 2⁷ = 56426393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56426551) 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, 2175 + ... + 10843.

It is an arithmetic number, because the mean of its divisors is an integer number (7386840).

Almost surely, 2^56426521 is an apocalyptic number.

It is an amenable number.

56426521 is a deficient number, since it is larger than the sum of its proper divisors (2668199).

56426521 is a wasteful number, since it uses less digits than its factorization.

56426521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8975.

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

The square root of 56426521 is about 7511.7588486319. The cubic root of 56426521 is about 383.5550968029. Note that the first 3 decimals are identical.

Adding to 56426521 its reverse (12562465), we get a palindrome (68988986).

The spelling of 56426521 in words is "fifty-six million, four hundred twenty-six thousand, five hundred twenty-one".