72224331 has 4 divisors (see below), whose sum is σ = 96299112. Its totient is φ = 48149552.

The previous prime is 72224311. The next prime is 72224351. The reversal of 72224331 is 13342227.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (72224311) and next prime (72224351).

It is a cyclic number.

It is not a de Polignac number, because 72224331 - 2¹³ = 72216139 is a prime.

It is a super-2 number, since 2×72224331² = 10432707976795122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72224311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12037386 + ... + 12037391.

It is an arithmetic number, because the mean of its divisors is an integer number (24074778).

Almost surely, 2^72224331 is an apocalyptic number.

72224331 is a deficient number, since it is larger than the sum of its proper divisors (24074781).

72224331 is a wasteful number, since it uses less digits than its factorization.

72224331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24074780.

The product of its digits is 2016, while the sum is 24.

The square root of 72224331 is about 8498.4899246866. The cubic root of 72224331 is about 416.4483789589.

Adding to 72224331 its reverse (13342227), we get a palindrome (85566558).

The spelling of 72224331 in words is "seventy-two million, two hundred twenty-four thousand, three hundred thirty-one".