87555501 has 48 divisors (see below), whose sum is σ = 145686528. Its totient is φ = 50176800.

The previous prime is 87555487. The next prime is 87555509. The reversal of 87555501 is 10555578.

It is not a de Polignac number, because 87555501 - 2⁷ = 87555373 is a prime.

It is a super-2 number, since 2×87555501² = 15331931510722002, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87555509) 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 47 ways as a sum of consecutive naturals, for example, 143940 + ... + 144546.

It is an arithmetic number, because the mean of its divisors is an integer number (3035136).

Almost surely, 2^87555501 is an apocalyptic number.

It is an amenable number.

87555501 is a deficient number, since it is larger than the sum of its proper divisors (58131027).

87555501 is a wasteful number, since it uses less digits than its factorization.

87555501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702 (or 699 counting only the distinct ones).

The product of its (nonzero) digits is 35000, while the sum is 36.

The square root of 87555501 is about 9357.1096498866. The cubic root of 87555501 is about 444.0458468606.

The spelling of 87555501 in words is "eighty-seven million, five hundred fifty-five thousand, five hundred one".