72297233 has 16 divisors (see below), whose sum is σ = 76640256. Its totient is φ = 68122320.

The previous prime is 72297217. The next prime is 72297263. The reversal of 72297233 is 33279227.

It is not a de Polignac number, because 72297233 - 2⁴ = 72297217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72297193 and 72297202.

It is not an unprimeable number, because it can be changed into a prime (72297263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167528 + ... + 167958.

It is an arithmetic number, because the mean of its divisors is an integer number (4790016).

Almost surely, 2^72297233 is an apocalyptic number.

It is an amenable number.

72297233 is a deficient number, since it is larger than the sum of its proper divisors (4343023).

72297233 is a wasteful number, since it uses less digits than its factorization.

72297233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604.

The product of its digits is 31752, while the sum is 35.

The square root of 72297233 is about 8502.7779578206. Note that the first 3 decimals coincide. The cubic root of 72297233 is about 416.5884504560.

The spelling of 72297233 in words is "seventy-two million, two hundred ninety-seven thousand, two hundred thirty-three".