56243966 has 4 divisors (see below), whose sum is σ = 84365952. Its totient is φ = 28121982.

The previous prime is 56243927. The next prime is 56243969. The reversal of 56243966 is 66934265.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66934265 = 5 ⋅13386853.

It is a super-2 number, since 2×56243966² = 6326767422818312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56243969) 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 as a sum of consecutive naturals, namely, 14060990 + ... + 14060993.

It is an arithmetic number, because the mean of its divisors is an integer number (21091488).

Almost surely, 2^56243966 is an apocalyptic number.

56243966 is a deficient number, since it is larger than the sum of its proper divisors (28121986).

56243966 is a wasteful number, since it uses less digits than its factorization.

56243966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28121985.

The product of its digits is 233280, while the sum is 41.

The square root of 56243966 is about 7499.5977225449. The cubic root of 56243966 is about 383.1410152295.

The spelling of 56243966 in words is "fifty-six million, two hundred forty-three thousand, nine hundred sixty-six".