221123152 has 20 divisors (see below), whose sum is σ = 431306100. Its totient is φ = 109818368.

The previous prime is 221123143. The next prime is 221123167. The reversal of 221123152 is 251321122.

221123152 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 49617936 + 171505216 = 7044^2 + 13096^2 .

It is a super-4 number, since 4×221123152⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43993 + ... + 48760.

It is an arithmetic number, because the mean of its divisors is an integer number (21565305).

Almost surely, 2^221123152 is an apocalyptic number.

It is an amenable number.

221123152 is a deficient number, since it is larger than the sum of its proper divisors (210182948).

221123152 is a wasteful number, since it uses less digits than its factorization.

221123152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92910 (or 92904 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 221123152 is about 14870.2102204374. The cubic root of 221123152 is about 604.7066419218.

Adding to 221123152 its reverse (251321122), we get a palindrome (472444274).

The spelling of 221123152 in words is "two hundred twenty-one million, one hundred twenty-three thousand, one hundred fifty-two".