72512223 has 16 divisors (see below), whose sum is σ = 111073536. Its totient is φ = 41218560.

The previous prime is 72512221. The next prime is 72512257. The reversal of 72512223 is 32221527.

It is a happy number.

It is not a de Polignac number, because 72512223 - 2¹ = 72512221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72512193 and 72512202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72512221) 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, 4893 + ... + 12998.

It is an arithmetic number, because the mean of its divisors is an integer number (6942096).

Almost surely, 2^72512223 is an apocalyptic number.

72512223 is a deficient number, since it is larger than the sum of its proper divisors (38561313).

72512223 is a wasteful number, since it uses less digits than its factorization.

72512223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18094.

The product of its digits is 1680, while the sum is 24.

The square root of 72512223 is about 8515.4109119877. The cubic root of 72512223 is about 417.0009776329. Note that the first 3 decimals are identical.

The spelling of 72512223 in words is "seventy-two million, five hundred twelve thousand, two hundred twenty-three".