56420033 has 4 divisors (see below), whose sum is σ = 56437380. Its totient is φ = 56402688.

The previous prime is 56420029. The next prime is 56420047. The reversal of 56420033 is 33002465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33002465 = 5 ⋅6600493.

It can be written as a sum of positive squares in 2 ways, for example, as 4464769 + 51955264 = 2113^2 + 7208^2 .

It is a cyclic number.

It is not a de Polignac number, because 56420033 - 2² = 56420029 is a prime.

It is a deceptive number, since it divides R_56420032.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56419990 and 56420008.

It is not an unprimeable number, because it can be changed into a prime (56420003) 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, 2168 + ... + 10841.

It is an arithmetic number, because the mean of its divisors is an integer number (14109345).

It is a Poulet number, since it divides 2^56420032-1.

Almost surely, 2^56420033 is an apocalyptic number.

56420033 is the 4337-th octagonal number.

It is an amenable number.

56420033 is a deficient number, since it is larger than the sum of its proper divisors (17347).

56420033 is a wasteful number, since it uses less digits than its factorization.

56420033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17346.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 56420033 is about 7511.3269799683. The cubic root of 56420033 is about 383.5403956730.

Adding to 56420033 its reverse (33002465), we get a palindrome (89422498).

The spelling of 56420033 in words is "fifty-six million, four hundred twenty thousand, thirty-three".