56815542 has 24 divisors (see below), whose sum is σ = 140686416. Its totient is φ = 16232976.

The previous prime is 56815541. The next prime is 56815559. The reversal of 56815542 is 24551865.

56815542 is a `hidden beast` number, since 568 + 1 + 55 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 56815497 and 56815506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56815541) 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 11 ways as a sum of consecutive naturals, for example, 225333 + ... + 225584.

It is an arithmetic number, because the mean of its divisors is an integer number (5861934).

Almost surely, 2^56815542 is an apocalyptic number.

56815542 is an abundant number, since it is smaller than the sum of its proper divisors (83870874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56815542 is a wasteful number, since it uses less digits than its factorization.

56815542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450932 (or 450929 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 56815542 is about 7537.6085066817. The cubic root of 56815542 is about 384.4345260180.

It can be divided in two parts, 568 and 15542, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 56815542 in words is "fifty-six million, eight hundred fifteen thousand, five hundred forty-two".