87177222 has 96 divisors (see below), whose sum is σ = 223292160. Its totient is φ = 25233120.

The previous prime is 87177221. The next prime is 87177247. The reversal of 87177222 is 22277178.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87177221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 122604 + ... + 123312.

It is an arithmetic number, because the mean of its divisors is an integer number (2325960).

Almost surely, 2^87177222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87177222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111646080).

87177222 is an abundant number, since it is smaller than the sum of its proper divisors (136114938).

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

87177222 is a wasteful number, since it uses less digits than its factorization.

87177222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 748 counting only the distinct ones).

The product of its digits is 21952, while the sum is 36.

The square root of 87177222 is about 9336.8743163866. The cubic root of 87177222 is about 443.4054313305.

The spelling of 87177222 in words is "eighty-seven million, one hundred seventy-seven thousand, two hundred twenty-two".