87043556 has 6 divisors (see below), whose sum is σ = 152326230. Its totient is φ = 43521776.

The previous prime is 87043507. The next prime is 87043559. The reversal of 87043556 is 65534078.

It can be written as a sum of positive squares in only one way, i.e., 44009956 + 43033600 = 6634^2 + 6560^2 .

It is a super-2 number, since 2×87043556² = 15153161282250272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87043559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10880441 + ... + 10880448.

It is an arithmetic number, because the mean of its divisors is an integer number (25387705).

Almost surely, 2^87043556 is an apocalyptic number.

It is an amenable number.

87043556 is a deficient number, since it is larger than the sum of its proper divisors (65282674).

87043556 is a wasteful number, since it uses less digits than its factorization.

87043556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21760893 (or 21760891 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 87043556 is about 9329.7136076088. The cubic root of 87043556 is about 443.1786956986.

The spelling of 87043556 in words is "eighty-seven million, forty-three thousand, five hundred fifty-six".