72158185 has 8 divisors (see below), whose sum is σ = 94461696. Its totient is φ = 52478640.

The previous prime is 72158161. The next prime is 72158209. The reversal of 72158185 is 58185127.

It is an interprime number because it is at equal distance from previous prime (72158161) and next prime (72158209).

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

It is not a de Polignac number, because 72158185 - 2⁷ = 72158057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 655929 + ... + 656038.

It is an arithmetic number, because the mean of its divisors is an integer number (11807712).

Almost surely, 2^72158185 is an apocalyptic number.

It is an amenable number.

72158185 is a deficient number, since it is larger than the sum of its proper divisors (22303511).

72158185 is a wasteful number, since it uses less digits than its factorization.

72158185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311983.

The product of its digits is 22400, while the sum is 37.

The square root of 72158185 is about 8494.5974007012. The cubic root of 72158185 is about 416.3212066346.

It can be divided in two parts, 7215 and 8185, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 72158185 in words is "seventy-two million, one hundred fifty-eight thousand, one hundred eighty-five".