72335231 has 4 divisors (see below), whose sum is σ = 72678264. Its totient is φ = 71992200.

The previous prime is 72335201. The next prime is 72335233. The reversal of 72335231 is 13253327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13253327 = 719 ⋅18433.

It is a cyclic number.

It is not a de Polignac number, because 72335231 - 2⁶ = 72335167 is a prime.

It is a super-2 number, since 2×72335231² = 10464771287646722, 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 72335231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72335233) 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, 171200 + ... + 171621.

It is an arithmetic number, because the mean of its divisors is an integer number (18169566).

Almost surely, 2^72335231 is an apocalyptic number.

72335231 is a deficient number, since it is larger than the sum of its proper divisors (343033).

72335231 is a wasteful number, since it uses less digits than its factorization.

72335231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343032.

The product of its digits is 3780, while the sum is 26.

The square root of 72335231 is about 8505.0121105146. The cubic root of 72335231 is about 416.6614212317.

Adding to 72335231 its reverse (13253327), we get a palindrome (85588558).

The spelling of 72335231 in words is "seventy-two million, three hundred thirty-five thousand, two hundred thirty-one".