56981542 has 4 divisors (see below), whose sum is σ = 85472316. Its totient is φ = 28490770.

The previous prime is 56981539. The next prime is 56981543. The reversal of 56981542 is 24518965.

56981542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×56981542² = 6493792257395528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 56981495 and 56981504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56981543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14245384 + ... + 14245387.

It is an arithmetic number, because the mean of its divisors is an integer number (21368079).

Almost surely, 2^56981542 is an apocalyptic number.

56981542 is a deficient number, since it is larger than the sum of its proper divisors (28490774).

56981542 is a wasteful number, since it uses less digits than its factorization.

56981542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28490773.

The product of its digits is 86400, while the sum is 40.

The square root of 56981542 is about 7548.6119253807. The cubic root of 56981542 is about 384.8085673365.

The spelling of 56981542 in words is "fifty-six million, nine hundred eighty-one thousand, five hundred forty-two".