221072024 has 8 divisors (see below), whose sum is σ = 414510060. Its totient is φ = 110536008.

The previous prime is 221071999. The next prime is 221072039. The reversal of 221072024 is 420270122.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 221071987 and 221072005.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 13816994 + ... + 13817009.

Almost surely, 2^221072024 is an apocalyptic number.

It is an amenable number.

221072024 is a deficient number, since it is larger than the sum of its proper divisors (193438036).

221072024 is a wasteful number, since it uses less digits than its factorization.

221072024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27634009 (or 27634005 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 221072024 is about 14868.4909792487. The cubic root of 221072024 is about 604.6600316594.

The spelling of 221072024 in words is "two hundred twenty-one million, seventy-two thousand, twenty-four".