56842221 has 8 divisors (see below), whose sum is σ = 76029984. Its totient is φ = 37774640.

The previous prime is 56842217. The next prime is 56842229. The reversal of 56842221 is 12224865.

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 56842221 - 2² = 56842217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56842229) 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 7 ways as a sum of consecutive naturals, for example, 28935 + ... + 30836.

It is an arithmetic number, because the mean of its divisors is an integer number (9503748).

Almost surely, 2^56842221 is an apocalyptic number.

It is an amenable number.

56842221 is a deficient number, since it is larger than the sum of its proper divisors (19187763).

56842221 is a wasteful number, since it uses less digits than its factorization.

56842221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60091.

The product of its digits is 7680, while the sum is 30.

The square root of 56842221 is about 7539.3780247445. The cubic root of 56842221 is about 384.4946898594.

The spelling of 56842221 in words is "fifty-six million, eight hundred forty-two thousand, two hundred twenty-one".