56123381 has 8 divisors (see below), whose sum is σ = 60583680. Its totient is φ = 51831472.

The previous prime is 56123351. The next prime is 56123387. The reversal of 56123381 is 18332165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56123381 - 2⁶ = 56123317 is a prime.

It is a super-2 number, since 2×56123381² = 6299667789742322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56123387) 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 7 ways as a sum of consecutive naturals, for example, 41405 + ... + 42738.

It is an arithmetic number, because the mean of its divisors is an integer number (7572960).

Almost surely, 2^56123381 is an apocalyptic number.

It is an amenable number.

56123381 is a deficient number, since it is larger than the sum of its proper divisors (4460299).

56123381 is a wasteful number, since it uses less digits than its factorization.

56123381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84195.

The product of its digits is 4320, while the sum is 29.

The square root of 56123381 is about 7491.5539776471. The cubic root of 56123381 is about 382.8670058866.

The spelling of 56123381 in words is "fifty-six million, one hundred twenty-three thousand, three hundred eighty-one".