56215223 has 4 divisors (see below), whose sum is σ = 57586368. Its totient is φ = 54844080.

The previous prime is 56215217. The next prime is 56215231. The reversal of 56215223 is 32251265.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56215223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56215192 and 56215201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56215213) 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, 685511 + ... + 685592.

It is an arithmetic number, because the mean of its divisors is an integer number (14396592).

Almost surely, 2^56215223 is an apocalyptic number.

56215223 is a deficient number, since it is larger than the sum of its proper divisors (1371145).

56215223 is a wasteful number, since it uses less digits than its factorization.

56215223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371144.

The product of its digits is 3600, while the sum is 26.

The square root of 56215223 is about 7497.6811748700. The cubic root of 56215223 is about 383.0757371236.

Adding to 56215223 its reverse (32251265), we get a palindrome (88466488).

The spelling of 56215223 in words is "fifty-six million, two hundred fifteen thousand, two hundred twenty-three".