86415551 has 4 divisors (see below), whose sum is σ = 86850000. Its totient is φ = 85981104.

The previous prime is 86415523. The next prime is 86415587. The reversal of 86415551 is 15551468.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86415551 - 2¹⁴ = 86399167 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 (86415451) 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, 216926 + ... + 217323.

It is an arithmetic number, because the mean of its divisors is an integer number (21712500).

Almost surely, 2^86415551 is an apocalyptic number.

86415551 is a deficient number, since it is larger than the sum of its proper divisors (434449).

86415551 is a wasteful number, since it uses less digits than its factorization.

86415551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434448.

The product of its digits is 24000, while the sum is 35.

The square root of 86415551 is about 9295.9965038720. The cubic root of 86415551 is about 442.1103015669.

The spelling of 86415551 in words is "eighty-six million, four hundred fifteen thousand, five hundred fifty-one".