221342152 has 32 divisors (see below), whose sum is σ = 430255800. Its totient is φ = 106624000.

The previous prime is 221342141. The next prime is 221342203. The reversal of 221342152 is 251243122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 194156356 + 27185796 = 13934^2 + 5214^2 .

It is a super-2 number, since 2×221342152² = 97984696503982208, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161952 + ... + 163312.

Almost surely, 2^221342152 is an apocalyptic number.

It is an amenable number.

221342152 is a deficient number, since it is larger than the sum of its proper divisors (208913648).

221342152 is a wasteful number, since it uses less digits than its factorization.

221342152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097 (or 2093 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 221342152 is about 14877.5721137557. The cubic root of 221342152 is about 604.9062095348.

Adding to 221342152 its reverse (251243122), we get a palindrome (472585274).

The spelling of 221342152 in words is "two hundred twenty-one million, three hundred forty-two thousand, one hundred fifty-two".