220106249 has 4 divisors (see below), whose sum is σ = 240115920. Its totient is φ = 200096580.

The previous prime is 220106221. The next prime is 220106267. The reversal of 220106249 is 942601022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220106249 - 2¹² = 220102153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220106269) 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, 10004819 + ... + 10004840.

It is an arithmetic number, because the mean of its divisors is an integer number (60028980).

Almost surely, 2^220106249 is an apocalyptic number.

It is an amenable number.

220106249 is a deficient number, since it is larger than the sum of its proper divisors (20009671).

220106249 is a wasteful number, since it uses less digits than its factorization.

220106249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20009670.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 220106249 is about 14835.9781949152. The cubic root of 220106249 is about 603.7782406307.

The spelling of 220106249 in words is "two hundred twenty million, one hundred six thousand, two hundred forty-nine".