56243387 has 4 divisors (see below), whose sum is σ = 56385456. Its totient is φ = 56101320.

The previous prime is 56243359. The next prime is 56243389. The reversal of 56243387 is 78334265.

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 56243387 - 2⁶ = 56243323 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56243387.

It is not an unprimeable number, because it can be changed into a prime (56243389) 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, 70439 + ... + 71232.

It is an arithmetic number, because the mean of its divisors is an integer number (14096364).

Almost surely, 2^56243387 is an apocalyptic number.

56243387 is a deficient number, since it is larger than the sum of its proper divisors (142069).

56243387 is a wasteful number, since it uses less digits than its factorization.

56243387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142068.

The product of its digits is 120960, while the sum is 38.

The square root of 56243387 is about 7499.5591203750. The cubic root of 56243387 is about 383.1397004845.

The spelling of 56243387 in words is "fifty-six million, two hundred forty-three thousand, three hundred eighty-seven".