72507229 has 16 divisors (see below), whose sum is σ = 76640256. Its totient is φ = 68521600.

The previous prime is 72507217. The next prime is 72507251. The reversal of 72507229 is 92270527.

It is a cyclic number.

It is not a de Polignac number, because 72507229 - 2¹⁹ = 71982941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72507194 and 72507203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72507269) 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, 367959 + ... + 368155.

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

Almost surely, 2^72507229 is an apocalyptic number.

It is an amenable number.

72507229 is a deficient number, since it is larger than the sum of its proper divisors (4133027).

72507229 is a wasteful number, since it uses less digits than its factorization.

72507229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 72507229 is about 8515.1176738786. The cubic root of 72507229 is about 416.9914043012.

The spelling of 72507229 in words is "seventy-two million, five hundred seven thousand, two hundred twenty-nine".