87055572220 has 24 divisors (see below), whose sum is σ = 185391587808. Its totient is φ = 34331774400.

The previous prime is 87055572193. The next prime is 87055572377. The reversal of 87055572220 is 2227555078.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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 7 ways as a sum of consecutive naturals, for example, 30651951 + ... + 30654790.

It is an arithmetic number, because the mean of its divisors is an integer number (7724649492).

Almost surely, 2^87055572220 is an apocalyptic number.

It is an amenable number.

87055572220 is an abundant number, since it is smaller than the sum of its proper divisors (98336015588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87055572220 is a wasteful number, since it uses less digits than its factorization.

87055572220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61306821 (or 61306819 counting only the distinct ones).

The product of its (nonzero) digits is 392000, while the sum is 43.

The spelling of 87055572220 in words is "eighty-seven billion, fifty-five million, five hundred seventy-two thousand, two hundred twenty".