221926849 has 2 divisors, whose sum is σ = 221926850. Its totient is φ = 221926848.

The previous prime is 221926819. The next prime is 221926853. The reversal of 221926849 is 948629122.

It is a happy number.

221926849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200024449 + 21902400 = 14143^2 + 4680^2 .

It is a cyclic number.

It is not a de Polignac number, because 221926849 - 2⁹ = 221926337 is a prime.

It is not a weakly prime, because it can be changed into another prime (221926819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110963424 + 110963425.

It is an arithmetic number, because the mean of its divisors is an integer number (110963425).

Almost surely, 2^221926849 is an apocalyptic number.

It is an amenable number.

221926849 is a deficient number, since it is larger than the sum of its proper divisors (1).

221926849 is an equidigital number, since it uses as much as digits as its factorization.

221926849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The square root of 221926849 is about 14897.2094366697. The cubic root of 221926849 is about 605.4383809057.

The spelling of 221926849 in words is "two hundred twenty-one million, nine hundred twenty-six thousand, eight hundred forty-nine".