87422571 has 10 divisors (see below), whose sum is σ = 130594332. Its totient is φ = 58281660.

The previous prime is 87422567. The next prime is 87422581. The reversal of 87422571 is 17522478.

87422571 is a `hidden beast` number, since 87 + 4 + 2 + 2 + 571 = 666.

It is not a de Polignac number, because 87422571 - 2² = 87422567 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87422581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 539565 + ... + 539726.

Almost surely, 2^87422571 is an apocalyptic number.

87422571 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

87422571 is a deficient number, since it is larger than the sum of its proper divisors (43171761).

87422571 is a wasteful number, since it uses less digits than its factorization.

87422571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079303 (or 1079294 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 87422571 is about 9350.0037967907. The cubic root of 87422571 is about 443.8210107612.

The spelling of 87422571 in words is "eighty-seven million, four hundred twenty-two thousand, five hundred seventy-one".