87222419 has 2 divisors, whose sum is σ = 87222420. Its totient is φ = 87222418.

The previous prime is 87222397. The next prime is 87222439. The reversal of 87222419 is 91422278.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87222419 is a prime.

It is a super-2 number, since 2×87222419² = 15215500752423122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87222439) 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, 43611209 + 43611210.

It is an arithmetic number, because the mean of its divisors is an integer number (43611210).

Almost surely, 2^87222419 is an apocalyptic number.

87222419 is a deficient number, since it is larger than the sum of its proper divisors (1).

87222419 is an equidigital number, since it uses as much as digits as its factorization.

87222419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 87222419 is about 9339.2943523587. The cubic root of 87222419 is about 443.4820458883.

The spelling of 87222419 in words is "eighty-seven million, two hundred twenty-two thousand, four hundred nineteen".