56212231 has 4 divisors (see below), whose sum is σ = 56641464. Its totient is φ = 55783000.

The previous prime is 56212229. The next prime is 56212243. The reversal of 56212231 is 13221265.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56212231 - 2¹ = 56212229 is a prime.

It is a super-2 number, since 2×56212231² = 6319629827994722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56212201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214420 + ... + 214681.

It is an arithmetic number, because the mean of its divisors is an integer number (14160366).

Almost surely, 2^56212231 is an apocalyptic number.

56212231 is a deficient number, since it is larger than the sum of its proper divisors (429233).

56212231 is a wasteful number, since it uses less digits than its factorization.

56212231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429232.

The product of its digits is 720, while the sum is 22.

The square root of 56212231 is about 7497.4816438588. The cubic root of 56212231 is about 383.0689407265.

Adding to 56212231 its reverse (13221265), we get a palindrome (69433496).

The spelling of 56212231 in words is "fifty-six million, two hundred twelve thousand, two hundred thirty-one".