221245652 has 24 divisors (see below), whose sum is σ = 408055200. Its totient is φ = 104672736.

The previous prime is 221245649. The next prime is 221245657. The reversal of 221245652 is 256542122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221245657) 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, 96374 + ... + 98642.

It is an arithmetic number, because the mean of its divisors is an integer number (17002300).

Almost surely, 2^221245652 is an apocalyptic number.

It is an amenable number.

221245652 is a deficient number, since it is larger than the sum of its proper divisors (186809548).

221245652 is a wasteful number, since it uses less digits than its factorization.

221245652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575 (or 3573 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 221245652 is about 14874.3286235043. The cubic root of 221245652 is about 604.8182884378.

Adding to 221245652 its reverse (256542122), we get a palindrome (477787774).

The spelling of 221245652 in words is "two hundred twenty-one million, two hundred forty-five thousand, six hundred fifty-two".