221802072 has 32 divisors (see below), whose sum is σ = 556940400. Its totient is φ = 73609344.

The previous prime is 221802023. The next prime is 221802073. The reversal of 221802072 is 270208122.

It is a happy number.

221802072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221802073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14683 + ... + 25674.

Almost surely, 2^221802072 is an apocalyptic number.

It is an amenable number.

221802072 is an abundant number, since it is smaller than the sum of its proper divisors (335138328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221802072 is a wasteful number, since it uses less digits than its factorization.

221802072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40595 (or 40591 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 221802072 is about 14893.0209158518. The cubic root of 221802072 is about 605.3248916369.

The spelling of 221802072 in words is "two hundred twenty-one million, eight hundred two thousand, seventy-two".