56538447 has 16 divisors (see below), whose sum is σ = 91222272. Its totient is φ = 30407040.

The previous prime is 56538437. The next prime is 56538457. The reversal of 56538447 is 74483565.

It is an interprime number because it is at equal distance from previous prime (56538437) and next prime (56538457).

It is not a de Polignac number, because 56538447 - 2⁴ = 56538431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56538399 and 56538408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56538437) 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 in 15 ways as a sum of consecutive naturals, for example, 78829 + ... + 79542.

It is an arithmetic number, because the mean of its divisors is an integer number (5701392).

Almost surely, 2^56538447 is an apocalyptic number.

56538447 is a deficient number, since it is larger than the sum of its proper divisors (34683825).

56538447 is a wasteful number, since it uses less digits than its factorization.

56538447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158398.

The product of its digits is 403200, while the sum is 42.

The square root of 56538447 is about 7519.2052106589. The cubic root of 56538447 is about 383.8085322058.

The spelling of 56538447 in words is "fifty-six million, five hundred thirty-eight thousand, four hundred forty-seven".