72241161 has 16 divisors (see below), whose sum is σ = 99035904. Its totient is φ = 46814544.

The previous prime is 72241133. The next prime is 72241163. The reversal of 72241161 is 16114227.

It is not a de Polignac number, because 72241161 - 2¹³ = 72232969 is a prime.

It is a super-3 number, since 3×72241161³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (72241163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28050 + ... + 30516.

It is an arithmetic number, because the mean of its divisors is an integer number (6189744).

Almost surely, 2^72241161 is an apocalyptic number.

It is an amenable number.

72241161 is a deficient number, since it is larger than the sum of its proper divisors (26794743).

72241161 is a wasteful number, since it uses less digits than its factorization.

72241161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740.

The product of its digits is 672, while the sum is 24.

The square root of 72241161 is about 8499.4800429203. The cubic root of 72241161 is about 416.4807239308.

Adding to 72241161 its reverse (16114227), we get a palindrome (88355388).

It can be divided in two parts, 7224 and 1161, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 72241161 in words is "seventy-two million, two hundred forty-one thousand, one hundred sixty-one".