219891483901 has 2 divisors, whose sum is σ = 219891483902. Its totient is φ = 219891483900.

The previous prime is 219891483883. The next prime is 219891483913. The reversal of 219891483901 is 109384198912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115239880900 + 104651603001 = 339470^2 + 323499^2 .

It is a cyclic number.

It is not a de Polignac number, because 219891483901 - 2²¹ = 219889386749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219891483961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109945741950 + 109945741951.

It is an arithmetic number, because the mean of its divisors is an integer number (109945741951).

Almost surely, 2^219891483901 is an apocalyptic number.

It is an amenable number.

219891483901 is a deficient number, since it is larger than the sum of its proper divisors (1).

219891483901 is an equidigital number, since it uses as much as digits as its factorization.

219891483901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 55.

The spelling of 219891483901 in words is "two hundred nineteen billion, eight hundred ninety-one million, four hundred eighty-three thousand, nine hundred one".