87208555 has 32 divisors (see below), whose sum is σ = 127954944. Its totient is φ = 55696896.

The previous prime is 87208553. The next prime is 87208567. The reversal of 87208555 is 55580278.

It is not a de Polignac number, because 87208555 - 2¹ = 87208553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87208553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60574 + ... + 61996.

It is an arithmetic number, because the mean of its divisors is an integer number (3998592).

Almost surely, 2^87208555 is an apocalyptic number.

87208555 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

87208555 is a deficient number, since it is larger than the sum of its proper divisors (40746389).

87208555 is a wasteful number, since it uses less digits than its factorization.

87208555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555.

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 87208555 is about 9338.5520826304. The cubic root of 87208555 is about 443.4585474921.

The spelling of 87208555 in words is "eighty-seven million, two hundred eight thousand, five hundred fifty-five".