221032616 has 32 divisors (see below), whose sum is σ = 474128640. Its totient is φ = 94630848.

The previous prime is 221032613. The next prime is 221032627. The reversal of 221032616 is 616230122.

It is a junction number, because it is equal to n+sod(n) for n = 221032591 and 221032600.

It is not an unprimeable number, because it can be changed into a prime (221032613) 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, 89105 + ... + 91551.

It is an arithmetic number, because the mean of its divisors is an integer number (14816520).

Almost surely, 2^221032616 is an apocalyptic number.

It is an amenable number.

221032616 is an abundant number, since it is smaller than the sum of its proper divisors (253096024).

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

221032616 is a wasteful number, since it uses less digits than its factorization.

221032616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073 (or 4069 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 221032616 is about 14867.1657016393. The cubic root of 221032616 is about 604.6241008978.

Adding to 221032616 its reverse (616230122), we get a palindrome (837262738).

The spelling of 221032616 in words is "two hundred twenty-one million, thirty-two thousand, six hundred sixteen".