56211403 has 4 divisors (see below), whose sum is σ = 56791000. Its totient is φ = 55631808.

The previous prime is 56211383. The next prime is 56211427. The reversal of 56211403 is 30411265.

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 56211403 - 2⁵ = 56211371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56211203) 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 3 ways as a sum of consecutive naturals, for example, 289653 + ... + 289846.

It is an arithmetic number, because the mean of its divisors is an integer number (14197750).

Almost surely, 2^56211403 is an apocalyptic number.

56211403 is a deficient number, since it is larger than the sum of its proper divisors (579597).

56211403 is an equidigital number, since it uses as much as digits as its factorization.

56211403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579596.

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

The square root of 56211403 is about 7497.4264251142. The cubic root of 56211403 is about 383.0670598627.

Adding to 56211403 its reverse (30411265), we get a palindrome (86622668).

The spelling of 56211403 in words is "fifty-six million, two hundred eleven thousand, four hundred three".