72299227 has 16 divisors (see below), whose sum is σ = 97074432. Its totient is φ = 52002720.

The previous prime is 72299209. The next prime is 72299243.

72299227 = 924² + 925² + ... + 1001².

72299227 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 72299227 - 2¹¹ = 72297179 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72299227.

It is not an unprimeable number, because it can be changed into a prime (72299257) 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, 35113 + ... + 37114.

It is an arithmetic number, because the mean of its divisors is an integer number (6067152).

Almost surely, 2^72299227 is an apocalyptic number.

72299227 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

72299227 is a deficient number, since it is larger than the sum of its proper divisors (24775205).

72299227 is a wasteful number, since it uses less digits than its factorization.

72299227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72258.

The product of its digits is 63504, while the sum is 40.

The square root of 72299227 is about 8502.8952128084. The cubic root of 72299227 is about 416.5922803386.

The spelling of 72299227 in words is "seventy-two million, two hundred ninety-nine thousand, two hundred twenty-seven".