56033381 has 4 divisors (see below), whose sum is σ = 56064672. Its totient is φ = 56002092.

The previous prime is 56033363. The next prime is 56033389. The reversal of 56033381 is 18333065.

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: 18333065 = 5 ⋅3666613.

It is a cyclic number.

It is not a de Polignac number, because 56033381 - 2⁶ = 56033317 is a prime.

It is a super-3 number, since 3×56033381³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56033389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12785 + ... + 16598.

It is an arithmetic number, because the mean of its divisors is an integer number (14016168).

Almost surely, 2^56033381 is an apocalyptic number.

It is an amenable number.

56033381 is a deficient number, since it is larger than the sum of its proper divisors (31291).

56033381 is a wasteful number, since it uses less digits than its factorization.

56033381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31290.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 56033381 is about 7485.5448031523. The cubic root of 56033381 is about 382.6622399737.

The spelling of 56033381 in words is "fifty-six million, thirty-three thousand, three hundred eighty-one".