221132015 has 32 divisors (see below), whose sum is σ = 297439296. Its totient is φ = 156764160.

The previous prime is 221131997. The next prime is 221132029. The reversal of 221132015 is 510231122.

It is a happy number.

It is not a de Polignac number, because 221132015 - 2⁶ = 221131951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221131984 and 221132002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169847 + ... + 171143.

It is an arithmetic number, because the mean of its divisors is an integer number (9294978).

Almost surely, 2^221132015 is an apocalyptic number.

221132015 is a deficient number, since it is larger than the sum of its proper divisors (76307281).

221132015 is a wasteful number, since it uses less digits than its factorization.

221132015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 221132015 is about 14870.5082293780. The cubic root of 221132015 is about 604.7147210447.

Adding to 221132015 its reverse (510231122), we get a palindrome (731363137).

The spelling of 221132015 in words is "two hundred twenty-one million, one hundred thirty-two thousand, fifteen".