72624331 has 4 divisors (see below), whose sum is σ = 78210832. Its totient is φ = 67037832.

The previous prime is 72624329. The next prime is 72624341. The reversal of 72624331 is 13342627.

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

It is a cyclic number.

It is not a de Polignac number, because 72624331 - 2¹ = 72624329 is a prime.

It is a super-2 number, since 2×72624331² = 10548586906395122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72624331.

It is not an unprimeable number, because it can be changed into a prime (72624341) 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, 2793231 + ... + 2793256.

It is an arithmetic number, because the mean of its divisors is an integer number (19552708).

Almost surely, 2^72624331 is an apocalyptic number.

72624331 is a deficient number, since it is larger than the sum of its proper divisors (5586501).

72624331 is a wasteful number, since it uses less digits than its factorization.

72624331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5586500.

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

The square root of 72624331 is about 8521.9910232293. The cubic root of 72624331 is about 417.2157693469.

Adding to 72624331 its reverse (13342627), we get a palindrome (85966958).

It can be divided in two parts, 72 and 624331, that added together give a triangular number (624403 = T₁₁₁₇).

The spelling of 72624331 in words is "seventy-two million, six hundred twenty-four thousand, three hundred thirty-one".