56517223 has 4 divisors (see below), whose sum is σ = 64591120. Its totient is φ = 48443328.

The previous prime is 56517203. The next prime is 56517269. The reversal of 56517223 is 32271565.

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 56517223 - 2²¹ = 54420071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56517203) 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, 4036938 + ... + 4036951.

It is an arithmetic number, because the mean of its divisors is an integer number (16147780).

Almost surely, 2^56517223 is an apocalyptic number.

56517223 is a deficient number, since it is larger than the sum of its proper divisors (8073897).

56517223 is an equidigital number, since it uses as much as digits as its factorization.

56517223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8073896.

The product of its digits is 12600, while the sum is 31.

The square root of 56517223 is about 7517.7937588098. The cubic root of 56517223 is about 383.7605001601.

Adding to 56517223 its reverse (32271565), we get a palindrome (88788788).

The spelling of 56517223 in words is "fifty-six million, five hundred seventeen thousand, two hundred twenty-three".