56987551 has 8 divisors (see below), whose sum is σ = 58068864. Its totient is φ = 55915800.

The previous prime is 56987549. The next prime is 56987573. The reversal of 56987551 is 15578965.

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

It is a cyclic number.

It is not a de Polignac number, because 56987551 - 2¹ = 56987549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56987351) 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 7 ways as a sum of consecutive naturals, for example, 10260 + ... + 14806.

It is an arithmetic number, because the mean of its divisors is an integer number (7258608).

Almost surely, 2^56987551 is an apocalyptic number.

56987551 is a deficient number, since it is larger than the sum of its proper divisors (1081313).

56987551 is a wasteful number, since it uses less digits than its factorization.

56987551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4781.

The product of its digits is 378000, while the sum is 46.

The square root of 56987551 is about 7549.0099350842. The cubic root of 56987551 is about 384.8220935494.

The spelling of 56987551 in words is "fifty-six million, nine hundred eighty-seven thousand, five hundred fifty-one".