971921224 has 16 divisors (see below), whose sum is σ = 1829980800. Its totient is φ = 483926352.

The previous prime is 971921183. The next prime is 971921239. The reversal of 971921224 is 422129179.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252252 + ... + 256075.

It is an arithmetic number, because the mean of its divisors is an integer number (114373800).

Almost surely, 2^971921224 is an apocalyptic number.

It is an amenable number.

971921224 is a deficient number, since it is larger than the sum of its proper divisors (858059576).

971921224 is a wasteful number, since it uses less digits than its factorization.

971921224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508572 (or 508568 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 971921224 is about 31175.6511399522. The cubic root of 971921224 is about 990.5514133877.

The spelling of 971921224 in words is "nine hundred seventy-one million, nine hundred twenty-one thousand, two hundred twenty-four".