87222871 has 4 divisors (see below), whose sum is σ = 90036544. Its totient is φ = 84409200.

The previous prime is 87222859. The next prime is 87222887. The reversal of 87222871 is 17822278.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87222871 - 2¹³ = 87214679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87222871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87222841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406790 + ... + 1406851.

It is an arithmetic number, because the mean of its divisors is an integer number (22509136).

Almost surely, 2^87222871 is an apocalyptic number.

87222871 is a deficient number, since it is larger than the sum of its proper divisors (2813673).

87222871 is a wasteful number, since it uses less digits than its factorization.

87222871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813672.

The product of its digits is 25088, while the sum is 37.

The square root of 87222871 is about 9339.3185511578. The cubic root of 87222871 is about 443.4828119511.

The spelling of 87222871 in words is "eighty-seven million, two hundred twenty-two thousand, eight hundred seventy-one".