86571916 has 6 divisors (see below), whose sum is σ = 151500860. Its totient is φ = 43285956.

The previous prime is 86571911. The next prime is 86571917. The reversal of 86571916 is 61917568.

It is a happy number.

It is a super-2 number, since 2×86571916² = 14989393279822112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86571911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10821486 + ... + 10821493.

Almost surely, 2^86571916 is an apocalyptic number.

It is an amenable number.

86571916 is a deficient number, since it is larger than the sum of its proper divisors (64928944).

86571916 is a wasteful number, since it uses less digits than its factorization.

86571916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21642983 (or 21642981 counting only the distinct ones).

The product of its digits is 90720, while the sum is 43.

The square root of 86571916 is about 9304.4030437208. The cubic root of 86571916 is about 442.3768003709.

The spelling of 86571916 in words is "eighty-six million, five hundred seventy-one thousand, nine hundred sixteen".