72241137 has 12 divisors (see below), whose sum is σ = 108885504. Its totient is φ = 46066680.

The previous prime is 72241133. The next prime is 72241163. The reversal of 72241137 is 73114227.

It is a happy number.

It is not a de Polignac number, because 72241137 - 2² = 72241133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72241137.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72241133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174289 + ... + 174702.

It is an arithmetic number, because the mean of its divisors is an integer number (9073792).

Almost surely, 2^72241137 is an apocalyptic number.

It is an amenable number.

72241137 is a deficient number, since it is larger than the sum of its proper divisors (36644367).

72241137 is a wasteful number, since it uses less digits than its factorization.

72241137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349020 (or 349017 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 72241137 is about 8499.4786310691. The cubic root of 72241137 is about 416.4806778097.

The spelling of 72241137 in words is "seventy-two million, two hundred forty-one thousand, one hundred thirty-seven".