7216424 has 8 divisors (see below), whose sum is σ = 13530810. Its totient is φ = 3608208.

The previous prime is 7216423. The next prime is 7216439. The reversal of 7216424 is 4246127.

It can be written as a sum of positive squares in only one way, i.e., 6604900 + 611524 = 2570^2 + 782^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7216393 and 7216402.

It is not an unprimeable number, because it can be changed into a prime (7216421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451019 + ... + 451034.

Almost surely, 2^7216424 is an apocalyptic number.

It is an amenable number.

7216424 is a deficient number, since it is larger than the sum of its proper divisors (6314386).

7216424 is a wasteful number, since it uses less digits than its factorization.

7216424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902059 (or 902055 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 7216424 is about 2686.3402613965. The cubic root of 7216424 is about 193.2445913245.

The spelling of 7216424 in words is "seven million, two hundred sixteen thousand, four hundred twenty-four".