56280043 has 4 divisors (see below), whose sum is σ = 56302600. Its totient is φ = 56257488.

The previous prime is 56280031. The next prime is 56280053. The reversal of 56280043 is 34008265.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34008265 = 5 ⋅6801653.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56280043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56279993 and 56280020.

It is not an unprimeable number, because it can be changed into a prime (56280053) 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, 6993 + ... + 12706.

It is an arithmetic number, because the mean of its divisors is an integer number (14075650).

Almost surely, 2^56280043 is an apocalyptic number.

56280043 is a deficient number, since it is larger than the sum of its proper divisors (22557).

56280043 is a wasteful number, since it uses less digits than its factorization.

56280043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22556.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 56280043 is about 7502.0025993064. The cubic root of 56280043 is about 383.2229180835. Note that the first 3 decimals are identical.

The spelling of 56280043 in words is "fifty-six million, two hundred eighty thousand, forty-three".