221031049 has 2 divisors, whose sum is σ = 221031050. Its totient is φ = 221031048.

The previous prime is 221031043. The next prime is 221031053. The reversal of 221031049 is 940130122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128255625 + 92775424 = 11325^2 + 9632^2 .

It is a cyclic number.

It is not a de Polignac number, because 221031049 - 2⁵ = 221031017 is a prime.

It is not a weakly prime, because it can be changed into another prime (221031043) 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 as a sum of consecutive naturals, namely, 110515524 + 110515525.

It is an arithmetic number, because the mean of its divisors is an integer number (110515525).

Almost surely, 2^221031049 is an apocalyptic number.

It is an amenable number.

221031049 is a deficient number, since it is larger than the sum of its proper divisors (1).

221031049 is an equidigital number, since it uses as much as digits as its factorization.

221031049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 221031049 is about 14867.1130015212. The cubic root of 221031049 is about 604.6226720767.

The spelling of 221031049 in words is "two hundred twenty-one million, thirty-one thousand, forty-nine".