87522161 has 2 divisors, whose sum is σ = 87522162. Its totient is φ = 87522160.

The previous prime is 87522139. The next prime is 87522163. The reversal of 87522161 is 16122578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54390625 + 33131536 = 7375^2 + 5756^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87522161 is a prime.

It is a super-2 number, since 2×87522161² = 15320257332219842, which contains 22 as substring.

Together with 87522163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87522163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43761080 + 43761081.

It is an arithmetic number, because the mean of its divisors is an integer number (43761081).

Almost surely, 2^87522161 is an apocalyptic number.

It is an amenable number.

87522161 is a deficient number, since it is larger than the sum of its proper divisors (1).

87522161 is an equidigital number, since it uses as much as digits as its factorization.

87522161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 32.

The square root of 87522161 is about 9355.3279472181. The cubic root of 87522161 is about 443.9894774040.

The spelling of 87522161 in words is "eighty-seven million, five hundred twenty-two thousand, one hundred sixty-one".