222131005 has 4 divisors (see below), whose sum is σ = 266557212. Its totient is φ = 177704800.

The previous prime is 222130999. The next prime is 222131023. The reversal of 222131005 is 500131222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75672601 + 146458404 = 8699^2 + 12102^2 .

It is not a de Polignac number, because 222131005 - 2⁵ = 222130973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222131005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22213096 + ... + 22213105.

It is an arithmetic number, because the mean of its divisors is an integer number (66639303).

Almost surely, 2^222131005 is an apocalyptic number.

It is an amenable number.

222131005 is a deficient number, since it is larger than the sum of its proper divisors (44426207).

222131005 is an equidigital number, since it uses as much as digits as its factorization.

222131005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44426206.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 222131005 is about 14904.0600173241. The cubic root of 222131005 is about 605.6239765887.

Adding to 222131005 its reverse (500131222), we get a palindrome (722262227).

The spelling of 222131005 in words is "two hundred twenty-two million, one hundred thirty-one thousand, five".