72244131 has 8 divisors (see below), whose sum is σ = 96655440. Its totient is φ = 47997792.

The previous prime is 72244129. The next prime is 72244163. The reversal of 72244131 is 13144227.

It is a happy number.

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

It is not a de Polignac number, because 72244131 - 2¹ = 72244129 is a prime.

It is a super-2 number, since 2×72244131² = 10438428927890322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72244111) 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, 40216 + ... + 41973.

It is an arithmetic number, because the mean of its divisors is an integer number (12081930).

Almost surely, 2^72244131 is an apocalyptic number.

72244131 is a deficient number, since it is larger than the sum of its proper divisors (24411309).

72244131 is a wasteful number, since it uses less digits than its factorization.

72244131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82485.

The product of its digits is 1344, while the sum is 24.

The square root of 72244131 is about 8499.6547576946. The cubic root of 72244131 is about 416.4864313456.

Adding to 72244131 its reverse (13144227), we get a palindrome (85388358).

The spelling of 72244131 in words is "seventy-two million, two hundred forty-four thousand, one hundred thirty-one".