87243222 has 16 divisors (see below), whose sum is σ = 190348992. Its totient is φ = 26437320.

The previous prime is 87243217. The next prime is 87243227. The reversal of 87243222 is 22234278.

It is an interprime number because it is at equal distance from previous prime (87243217) and next prime (87243227).

It is a super-2 number, since 2×87243222² = 15222759569882568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87243222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87243227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 660868 + ... + 660999.

It is an arithmetic number, because the mean of its divisors is an integer number (11896812).

Almost surely, 2^87243222 is an apocalyptic number.

87243222 is an abundant number, since it is smaller than the sum of its proper divisors (103105770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87243222 is a wasteful number, since it uses less digits than its factorization.

87243222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321883.

The product of its digits is 10752, while the sum is 30.

The square root of 87243222 is about 9340.4080210663. The cubic root of 87243222 is about 443.5173006762.

The spelling of 87243222 in words is "eighty-seven million, two hundred forty-three thousand, two hundred twenty-two".