56781427 has 4 divisors (see below), whose sum is σ = 56798056. Its totient is φ = 56764800.

The previous prime is 56781419. The next prime is 56781463. The reversal of 56781427 is 72418765.

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 56781427 - 2³ = 56781419 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 56781427.

It is not an unprimeable number, because it can be changed into a prime (56731427) 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, 1113 + ... + 10714.

It is an arithmetic number, because the mean of its divisors is an integer number (14199514).

Almost surely, 2^56781427 is an apocalyptic number.

56781427 is a deficient number, since it is larger than the sum of its proper divisors (16629).

56781427 is a wasteful number, since it uses less digits than its factorization.

56781427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16628.

The product of its digits is 94080, while the sum is 40.

The square root of 56781427 is about 7535.3451812110. The cubic root of 56781427 is about 384.3575657988.

The spelling of 56781427 in words is "fifty-six million, seven hundred eighty-one thousand, four hundred twenty-seven".