87220000100 has 36 divisors (see below), whose sum is σ = 194382743604. Its totient is φ = 33945079680.

The previous prime is 87220000093. The next prime is 87220000103. The reversal of 87220000100 is 100002278.

It can be written as a sum of positive squares in 6 ways, for example, as 54523456 + 87165476644 = 7384^2 + 295238^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (87220000103) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 11782787 + ... + 11790186.

Almost surely, 2^87220000100 is an apocalyptic number.

It is an amenable number.

87220000100 is an abundant number, since it is smaller than the sum of its proper divisors (107162743504).

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

87220000100 is a wasteful number, since it uses less digits than its factorization.

87220000100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23573024 (or 23573017 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 87220000100 its reverse (100002278), we get a palindrome (87320002378).

The spelling of 87220000100 in words is "eighty-seven billion, two hundred twenty million, one hundred", and thus it is an aban number.