56981443 has 4 divisors (see below), whose sum is σ = 58521520. Its totient is φ = 55441368.

The previous prime is 56981429. The next prime is 56981479. The reversal of 56981443 is 34418965.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56981443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56981396 and 56981405.

It is not an unprimeable number, because it can be changed into a prime (56981543) 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, 769983 + ... + 770056.

It is an arithmetic number, because the mean of its divisors is an integer number (14630380).

Almost surely, 2^56981443 is an apocalyptic number.

56981443 is a deficient number, since it is larger than the sum of its proper divisors (1540077).

56981443 is a wasteful number, since it uses less digits than its factorization.

56981443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540076.

The product of its digits is 103680, while the sum is 40.

The square root of 56981443 is about 7548.6053678809. The cubic root of 56981443 is about 384.8083444803.

The spelling of 56981443 in words is "fifty-six million, nine hundred eighty-one thousand, four hundred forty-three".