72311242 has 8 divisors (see below), whose sum is σ = 109480896. Its totient is φ = 35817612.

The previous prime is 72311237. The next prime is 72311243. The reversal of 72311242 is 24211327.

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

It is not an unprimeable number, because it can be changed into a prime (72311243) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 168738 + ... + 169165.

It is an arithmetic number, because the mean of its divisors is an integer number (13685112).

Almost surely, 2^72311242 is an apocalyptic number.

72311242 is a deficient number, since it is larger than the sum of its proper divisors (37169654).

72311242 is a wasteful number, since it uses less digits than its factorization.

72311242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338012.

The product of its digits is 672, while the sum is 22.

The square root of 72311242 is about 8503.6017075119. The cubic root of 72311242 is about 416.6153560994.

Adding to 72311242 its reverse (24211327), we get a palindrome (96522569).

The spelling of 72311242 in words is "seventy-two million, three hundred eleven thousand, two hundred forty-two".