72224427 has 16 divisors (see below), whose sum is σ = 106778880. Its totient is φ = 43053600.

The previous prime is 72224419. The next prime is 72224441. The reversal of 72224427 is 72442227.

It is not a de Polignac number, because 72224427 - 2³ = 72224419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72224394 and 72224403.

It is not an unprimeable number, because it can be changed into a prime (72224827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15927 + ... + 19952.

It is an arithmetic number, because the mean of its divisors is an integer number (6673680).

Almost surely, 2^72224427 is an apocalyptic number.

72224427 is a deficient number, since it is larger than the sum of its proper divisors (34554453).

72224427 is a wasteful number, since it uses less digits than its factorization.

72224427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35954.

The product of its digits is 12544, while the sum is 30.

The square root of 72224427 is about 8498.4955727470. The cubic root of 72224427 is about 416.4485634721.

The spelling of 72224427 in words is "seventy-two million, two hundred twenty-four thousand, four hundred twenty-seven".