86172251 has 8 divisors (see below), whose sum is σ = 95409984. Its totient is φ = 77168520.

The previous prime is 86172143. The next prime is 86172259. The reversal of 86172251 is 15227168.

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

It is not a de Polignac number, because 86172251 - 2²² = 81977947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86172259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57725 + ... + 59198.

It is an arithmetic number, because the mean of its divisors is an integer number (11926248).

Almost surely, 2^86172251 is an apocalyptic number.

86172251 is a deficient number, since it is larger than the sum of its proper divisors (9237733).

86172251 is a wasteful number, since it uses less digits than its factorization.

86172251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117001.

The product of its digits is 6720, while the sum is 32.

The square root of 86172251 is about 9282.9010013034. The cubic root of 86172251 is about 441.6949961339.

The spelling of 86172251 in words is "eighty-six million, one hundred seventy-two thousand, two hundred fifty-one".