56420233 has 4 divisors (see below), whose sum is σ = 56488320. Its totient is φ = 56352148.

The previous prime is 56420213. The next prime is 56420237. The reversal of 56420233 is 33202465.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33202465 = 5 ⋅6640493.

It is a cyclic number.

It is not a de Polignac number, because 56420233 - 2¹⁷ = 56289161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56420198 and 56420207.

It is not an unprimeable number, because it can be changed into a prime (56420237) 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, 32785 + ... + 34462.

It is an arithmetic number, because the mean of its divisors is an integer number (14122080).

Almost surely, 2^56420233 is an apocalyptic number.

It is an amenable number.

56420233 is a deficient number, since it is larger than the sum of its proper divisors (68087).

56420233 is an equidigital number, since it uses as much as digits as its factorization.

56420233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68086.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 56420233 is about 7511.3402931834. The cubic root of 56420233 is about 383.5408488689.

Adding to 56420233 its reverse (33202465), we get a palindrome (89622698).

The spelling of 56420233 in words is "fifty-six million, four hundred twenty thousand, two hundred thirty-three".