72151851 has 8 divisors (see below), whose sum is σ = 100385280. Its totient is φ = 46009832.

The previous prime is 72151847. The next prime is 72151861. The reversal of 72151851 is 15815127.

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

It is a cyclic number.

It is not a de Polignac number, because 72151851 - 2² = 72151847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72151861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522771 + ... + 522908.

It is an arithmetic number, because the mean of its divisors is an integer number (12548160).

Almost surely, 2^72151851 is an apocalyptic number.

72151851 is a deficient number, since it is larger than the sum of its proper divisors (28233429).

72151851 is a wasteful number, since it uses less digits than its factorization.

72151851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045705.

The product of its digits is 2800, while the sum is 30.

The square root of 72151851 is about 8494.2245673163. The cubic root of 72151851 is about 416.3090248071.

Adding to 72151851 its reverse (15815127), we get a palindrome (87966978).

The spelling of 72151851 in words is "seventy-two million, one hundred fifty-one thousand, eight hundred fifty-one".