222149 has 2 divisors, whose sum is σ = 222150. Its totient is φ = 222148.

The previous prime is 222137. The next prime is 222151. The reversal of 222149 is 941222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184900 + 37249 = 430^2 + 193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222149 is a prime.

Together with 222151, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 222149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111074 + 111075.

It is an arithmetic number, because the mean of its divisors is an integer number (111075).

2²²²¹⁴⁹ is an apocalyptic number.

It is an amenable number.

222149 is a deficient number, since it is larger than the sum of its proper divisors (1).

222149 is an equidigital number, since it uses as much as digits as its factorization.

222149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 20.

The square root of 222149 is about 471.3268504976. The cubic root of 222149 is about 60.5640330165.

It can be divided in two parts, 22 and 2149, that multiplied together give a triangular number (47278 = T₃₀₇).

The spelling of 222149 in words is "two hundred twenty-two thousand, one hundred forty-nine".