56221131 has 8 divisors (see below), whose sum is σ = 78220800. Its totient is φ = 35851112.

The previous prime is 56221079. The next prime is 56221141. The reversal of 56221131 is 13112265.

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

It is not a de Polignac number, because 56221131 - 2¹¹ = 56219083 is a prime.

It is a super-2 number, since 2×56221131² = 6321631141838322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56221098 and 56221107.

It is not an unprimeable number, because it can be changed into a prime (56221141) 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, 407331 + ... + 407468.

It is an arithmetic number, because the mean of its divisors is an integer number (9777600).

Almost surely, 2^56221131 is an apocalyptic number.

56221131 is a deficient number, since it is larger than the sum of its proper divisors (21999669).

56221131 is a wasteful number, since it uses less digits than its factorization.

56221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814825.

The product of its digits is 360, while the sum is 21.

The square root of 56221131 is about 7498.0751529976. The cubic root of 56221131 is about 383.0891565739.

Adding to 56221131 its reverse (13112265), we get a palindrome (69333396).

The spelling of 56221131 in words is "fifty-six million, two hundred twenty-one thousand, one hundred thirty-one".