72151155 has 20 divisors (see below), whose sum is σ = 129338352. Its totient is φ = 38480400.

The previous prime is 72151139. The next prime is 72151169. The reversal of 72151155 is 55115127.

It is not a de Polignac number, because 72151155 - 2⁴ = 72151139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 19 ways as a sum of consecutive naturals, for example, 88671 + ... + 89480.

Almost surely, 2^72151155 is an apocalyptic number.

72151155 is a deficient number, since it is larger than the sum of its proper divisors (57187197).

72151155 is a wasteful number, since it uses less digits than its factorization.

72151155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178168 (or 178159 counting only the distinct ones).

The product of its digits is 1750, while the sum is 27.

The square root of 72151155 is about 8494.1835982041. The cubic root of 72151155 is about 416.3076861858.

The spelling of 72151155 in words is "seventy-two million, one hundred fifty-one thousand, one hundred fifty-five".