87555855 has 16 divisors (see below), whose sum is σ = 140251104. Its totient is φ = 46642560.

The previous prime is 87555847. The next prime is 87555883. The reversal of 87555855 is 55855578.

It is a happy number.

It is not a de Polignac number, because 87555855 - 2³ = 87555847 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12457 + ... + 18173.

It is an arithmetic number, because the mean of its divisors is an integer number (8765694).

Almost surely, 2^87555855 is an apocalyptic number.

87555855 is a deficient number, since it is larger than the sum of its proper divisors (52695249).

87555855 is a wasteful number, since it uses less digits than its factorization.

87555855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6746.

The product of its digits is 1400000, while the sum is 48.

The square root of 87555855 is about 9357.1285659651. The cubic root of 87555855 is about 444.0464453077.

It can be divided in two parts, 87555 and 855, that added together give a triangular number (88410 = T₄₂₀).

The spelling of 87555855 in words is "eighty-seven million, five hundred fifty-five thousand, eight hundred fifty-five".