86151820 has 12 divisors (see below), whose sum is σ = 180918864. Its totient is φ = 34460720.

The previous prime is 86151817. The next prime is 86151827. The reversal of 86151820 is 2815168.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2153776 + ... + 2153815.

It is an arithmetic number, because the mean of its divisors is an integer number (15076572).

Almost surely, 2^86151820 is an apocalyptic number.

It is an amenable number.

86151820 is an abundant number, since it is smaller than the sum of its proper divisors (94767044).

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

86151820 is a wasteful number, since it uses less digits than its factorization.

86151820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4307600 (or 4307598 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 86151820 is about 9281.8004718912. The cubic root of 86151820 is about 441.6600854998.

Adding to 86151820 its reverse (2815168), we get a palindrome (88966988).

The spelling of 86151820 in words is "eighty-six million, one hundred fifty-one thousand, eight hundred twenty".