87255811 has 2 divisors, whose sum is σ = 87255812. Its totient is φ = 87255810.

The previous prime is 87255797. The next prime is 87255821. The reversal of 87255811 is 11855278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87255811 - 2¹¹ = 87253763 is a prime.

It is a super-2 number, since 2×87255811² = 15227153106535442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87255821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43627905 + 43627906.

It is an arithmetic number, because the mean of its divisors is an integer number (43627906).

Almost surely, 2^87255811 is an apocalyptic number.

87255811 is a deficient number, since it is larger than the sum of its proper divisors (1).

87255811 is an equidigital number, since it uses as much as digits as its factorization.

87255811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22400, while the sum is 37.

The square root of 87255811 is about 9341.0818966542. The cubic root of 87255811 is about 443.5386324986.

The spelling of 87255811 in words is "eighty-seven million, two hundred fifty-five thousand, eight hundred eleven".