220633145 has 4 divisors (see below), whose sum is σ = 264759780. Its totient is φ = 176506512.

The previous prime is 220633141. The next prime is 220633151. The reversal of 220633145 is 541336022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541336022 = 2 ⋅270668011.

It can be written as a sum of positive squares in 2 ways, for example, as 155475961 + 65157184 = 12469^2 + 8072^2 .

It is a cyclic number.

It is not a de Polignac number, because 220633145 - 2² = 220633141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220633141) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 22063310 + ... + 22063319.

It is an arithmetic number, because the mean of its divisors is an integer number (66189945).

Almost surely, 2^220633145 is an apocalyptic number.

It is an amenable number.

220633145 is a deficient number, since it is larger than the sum of its proper divisors (44126635).

220633145 is an equidigital number, since it uses as much as digits as its factorization.

220633145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44126634.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 220633145 is about 14853.7249536943. The cubic root of 220633145 is about 604.2596366693.

Adding to 220633145 its reverse (541336022), we get a palindrome (761969167).

The spelling of 220633145 in words is "two hundred twenty million, six hundred thirty-three thousand, one hundred forty-five".