72351331 has 8 divisors (see below), whose sum is σ = 78019200. Its totient is φ = 66698112.

The previous prime is 72351329. The next prime is 72351341. The reversal of 72351331 is 13315327.

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

It is not a de Polignac number, because 72351331 - 2¹ = 72351329 is a prime.

It is a super-2 number, since 2×72351331² = 10469430194943122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72351296 and 72351305.

It is not an unprimeable number, because it can be changed into a prime (72351341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7995 + ... + 14443.

It is an arithmetic number, because the mean of its divisors is an integer number (9752400).

Almost surely, 2^72351331 is an apocalyptic number.

72351331 is a deficient number, since it is larger than the sum of its proper divisors (5667869).

72351331 is a wasteful number, since it uses less digits than its factorization.

72351331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7325.

The product of its digits is 1890, while the sum is 25.

The square root of 72351331 is about 8505.9585585635. The cubic root of 72351331 is about 416.6923317169.

Adding to 72351331 its reverse (13315327), we get a palindrome (85666658).

The spelling of 72351331 in words is "seventy-two million, three hundred fifty-one thousand, three hundred thirty-one".