87255881 has 2 divisors, whose sum is σ = 87255882. Its totient is φ = 87255880.

The previous prime is 87255863. The next prime is 87255989. The reversal of 87255881 is 18855278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87254281 + 1600 = 9341^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 87255881 - 2¹⁰ = 87254857 is a prime.

It is a super-2 number, since 2×87255881² = 15227177538172322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87255811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43627940 + 43627941.

It is an arithmetic number, because the mean of its divisors is an integer number (43627941).

Almost surely, 2^87255881 is an apocalyptic number.

It is an amenable number.

87255881 is a deficient number, since it is larger than the sum of its proper divisors (1).

87255881 is an equidigital number, since it uses as much as digits as its factorization.

87255881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 179200, while the sum is 44.

The square root of 87255881 is about 9341.0856435427. The cubic root of 87255881 is about 443.5387511065.

The spelling of 87255881 in words is "eighty-seven million, two hundred fifty-five thousand, eight hundred eighty-one".