87431822 has 8 divisors (see below), whose sum is σ = 131293200. Its totient is φ = 43667424.

The previous prime is 87431819. The next prime is 87431831. The reversal of 87431822 is 22813478.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 21947 + ... + 25622.

It is an arithmetic number, because the mean of its divisors is an integer number (16411650).

Almost surely, 2^87431822 is an apocalyptic number.

87431822 is a deficient number, since it is larger than the sum of its proper divisors (43861378).

87431822 is a wasteful number, since it uses less digits than its factorization.

87431822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48490.

The product of its digits is 21504, while the sum is 35.

The square root of 87431822 is about 9350.4984893855. The cubic root of 87431822 is about 443.8366651599.

The spelling of 87431822 in words is "eighty-seven million, four hundred thirty-one thousand, eight hundred twenty-two".