221675849 has 2 divisors, whose sum is σ = 221675850. Its totient is φ = 221675848.

The previous prime is 221675837. The next prime is 221675887. The reversal of 221675849 is 948576122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217031824 + 4644025 = 14732^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 221675849 - 2¹² = 221671753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221675809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110837924 + 110837925.

It is an arithmetic number, because the mean of its divisors is an integer number (110837925).

Almost surely, 2^221675849 is an apocalyptic number.

It is an amenable number.

221675849 is a deficient number, since it is larger than the sum of its proper divisors (1).

221675849 is an equidigital number, since it uses as much as digits as its factorization.

221675849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 221675849 is about 14888.7826567520. The cubic root of 221675849 is about 605.2100438638.

The spelling of 221675849 in words is "two hundred twenty-one million, six hundred seventy-five thousand, eight hundred forty-nine".