56481987 has 8 divisors (see below), whose sum is σ = 75366400. Its totient is φ = 37626120.

The previous prime is 56481977. The next prime is 56482021. The reversal of 56481987 is 78918465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56481987 - 2⁶ = 56481923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56481917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1987 + ... + 10812.

It is an arithmetic number, because the mean of its divisors is an integer number (9420800).

Almost surely, 2^56481987 is an apocalyptic number.

56481987 is a deficient number, since it is larger than the sum of its proper divisors (18884413).

56481987 is a wasteful number, since it uses less digits than its factorization.

56481987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14273.

The product of its digits is 483840, while the sum is 48.

The square root of 56481987 is about 7515.4498867333. The cubic root of 56481987 is about 383.6807309888.

The spelling of 56481987 in words is "fifty-six million, four hundred eighty-one thousand, nine hundred eighty-seven".