72511233 has 16 divisors (see below), whose sum is σ = 98292096. Its totient is φ = 47542400.

The previous prime is 72511213. The next prime is 72511253. The reversal of 72511233 is 33211527.

It is an interprime number because it is at equal distance from previous prime (72511213) and next prime (72511253).

It is a cyclic number.

It is not a de Polignac number, because 72511233 - 2⁹ = 72510721 is a prime.

It is a super-2 number, since 2×72511233² = 10515757822360578, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72511213) 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 15 ways as a sum of consecutive naturals, for example, 49885 + ... + 51317.

It is an arithmetic number, because the mean of its divisors is an integer number (6143256).

Almost surely, 2^72511233 is an apocalyptic number.

It is an amenable number.

72511233 is a deficient number, since it is larger than the sum of its proper divisors (25780863).

72511233 is a wasteful number, since it uses less digits than its factorization.

72511233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704.

The product of its digits is 1260, while the sum is 24.

The square root of 72511233 is about 8515.3527818875. The cubic root of 72511233 is about 416.9990798708. Note that the first 3 decimals are identical.

The spelling of 72511233 in words is "seventy-two million, five hundred eleven thousand, two hundred thirty-three".