968551221 has 32 divisors (see below), whose sum is σ = 1445064192. Its totient is φ = 571959360.

The previous prime is 968551211. The next prime is 968551223. The reversal of 968551221 is 122155869.

It is not a de Polignac number, because 968551221 - 2⁵ = 968551189 is a prime.

It is a nialpdrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 968551221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (968551223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1096446 + ... + 1097328.

It is an arithmetic number, because the mean of its divisors is an integer number (45158256).

Almost surely, 2^968551221 is an apocalyptic number.

It is an amenable number.

968551221 is a deficient number, since it is larger than the sum of its proper divisors (476512971).

968551221 is a wasteful number, since it uses less digits than its factorization.

968551221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713.

The product of its digits is 43200, while the sum is 39.

The square root of 968551221 is about 31121.5555684481. Note that the first 4 decimals coincide. The cubic root of 968551221 is about 989.4052207381.

It can be divided in two parts, 9685 and 51221, that added together give a palindrome (60906).

The spelling of 968551221 in words is "nine hundred sixty-eight million, five hundred fifty-one thousand, two hundred twenty-one".