87181422 has 16 divisors (see below), whose sum is σ = 174675072. Its totient is φ = 29008440.

The previous prime is 87181411. The next prime is 87181427. The reversal of 87181422 is 22418178.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87181427) 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, 9298 + ... + 16149.

It is an arithmetic number, because the mean of its divisors is an integer number (10917192).

Almost surely, 2^87181422 is an apocalyptic number.

87181422 is an abundant number, since it is smaller than the sum of its proper divisors (87493650).

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

87181422 is a wasteful number, since it uses less digits than its factorization.

87181422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26023.

The product of its digits is 7168, while the sum is 33.

The square root of 87181422 is about 9337.0992283471. The cubic root of 87181422 is about 443.4125519708.

The spelling of 87181422 in words is "eighty-seven million, one hundred eighty-one thousand, four hundred twenty-two".