86151821 has 8 divisors (see below), whose sum is σ = 101635584. Its totient is φ = 71462160.

The previous prime is 86151817. The next prime is 86151827. The reversal of 86151821 is 12815168.

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

It is not a de Polignac number, because 86151821 - 2² = 86151817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86151827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198290 + ... + 198723.

It is an arithmetic number, because the mean of its divisors is an integer number (12704448).

Almost surely, 2^86151821 is an apocalyptic number.

It is an amenable number.

86151821 is a deficient number, since it is larger than the sum of its proper divisors (15483763).

86151821 is a wasteful number, since it uses less digits than its factorization.

86151821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397051.

The product of its digits is 3840, while the sum is 32.

The square root of 86151821 is about 9281.8005257601. The cubic root of 86151821 is about 441.6600872087.

Adding to 86151821 its reverse (12815168), we get a palindrome (98966989).

The spelling of 86151821 in words is "eighty-six million, one hundred fifty-one thousand, eight hundred twenty-one".