221140275 has 12 divisors (see below), whose sum is σ = 365618712. Its totient is φ = 117941440.

The previous prime is 221140273. The next prime is 221140289. The reversal of 221140275 is 572041122.

It is not a de Polignac number, because 221140275 - 2¹ = 221140273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221140273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1474194 + ... + 1474343.

It is an arithmetic number, because the mean of its divisors is an integer number (30468226).

Almost surely, 2^221140275 is an apocalyptic number.

221140275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

221140275 is a deficient number, since it is larger than the sum of its proper divisors (144478437).

221140275 is a wasteful number, since it uses less digits than its factorization.

221140275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2948550 (or 2948545 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 221140275 is about 14870.7859577092. The cubic root of 221140275 is about 604.7222503048.

Adding to 221140275 its reverse (572041122), we get a palindrome (793181397).

It can be divided in two parts, 2211 and 40275, that added together give a triangular number (42486 = T₂₉₁).

The spelling of 221140275 in words is "two hundred twenty-one million, one hundred forty thousand, two hundred seventy-five".