221120516 has 6 divisors (see below), whose sum is σ = 386960910. Its totient is φ = 110560256.

The previous prime is 221120507. The next prime is 221120519. The reversal of 221120516 is 615021122.

It can be written as a sum of positive squares in only one way, i.e., 220225600 + 894916 = 14840^2 + 946^2 .

It is a super-2 number, since 2×221120516² = 97788565192212512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221120519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27640061 + ... + 27640068.

It is an arithmetic number, because the mean of its divisors is an integer number (64493485).

Almost surely, 2^221120516 is an apocalyptic number.

It is an amenable number.

221120516 is a deficient number, since it is larger than the sum of its proper divisors (165840394).

221120516 is a wasteful number, since it uses less digits than its factorization.

221120516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55280133 (or 55280131 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 221120516 is about 14870.1215865910. The cubic root of 221120516 is about 604.7042390179.

Adding to 221120516 its reverse (615021122), we get a palindrome (836141638).

The spelling of 221120516 in words is "two hundred twenty-one million, one hundred twenty thousand, five hundred sixteen".