2198562391 has 2 divisors, whose sum is σ = 2198562392. Its totient is φ = 2198562390.

The previous prime is 2198562329. The next prime is 2198562407. The reversal of 2198562391 is 1932658912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2198562391 - 2⁹ = 2198561879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2198512391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1099281195 + 1099281196.

It is an arithmetic number, because the mean of its divisors is an integer number (1099281196).

Almost surely, 2^2198562391 is an apocalyptic number.

2198562391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2198562391 is an equidigital number, since it uses as much as digits as its factorization.

2198562391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 46.

The square root of 2198562391 is about 46888.8301304266. The cubic root of 2198562391 is about 1300.3080908842.

The spelling of 2198562391 in words is "two billion, one hundred ninety-eight million, five hundred sixty-two thousand, three hundred ninety-one".