72243361 has 4 divisors (see below), whose sum is σ = 74573824. Its totient is φ = 69912900.

The previous prime is 72243343. The next prime is 72243389. The reversal of 72243361 is 16334227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72243361 - 2⁵ = 72243329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72243331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1165185 + ... + 1165246.

It is an arithmetic number, because the mean of its divisors is an integer number (18643456).

Almost surely, 2^72243361 is an apocalyptic number.

It is an amenable number.

72243361 is a deficient number, since it is larger than the sum of its proper divisors (2330463).

72243361 is a wasteful number, since it uses less digits than its factorization.

72243361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330462.

The product of its digits is 6048, while the sum is 28.

The square root of 72243361 is about 8499.6094616165. The cubic root of 72243361 is about 416.4849516605.

Adding to 72243361 its reverse (16334227), we get a palindrome (88577588).

It can be divided in two parts, 7224 and 3361, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 72243361 in words is "seventy-two million, two hundred forty-three thousand, three hundred sixty-one".