191222542513 has 4 divisors (see below), whose sum is σ = 191224985328. Its totient is φ = 191220099700.

The previous prime is 191222542507. The next prime is 191222542523. The reversal of 191222542513 is 315245222191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 191222542513 - 2⁹ = 191222542001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191222542523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1099963 + ... + 1261888.

It is an arithmetic number, because the mean of its divisors is an integer number (47806246332).

Almost surely, 2^191222542513 is an apocalyptic number.

It is an amenable number.

191222542513 is a deficient number, since it is larger than the sum of its proper divisors (2442815).

191222542513 is an equidigital number, since it uses as much as digits as its factorization.

191222542513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2442814.

The product of its digits is 43200, while the sum is 37.

The spelling of 191222542513 in words is "one hundred ninety-one billion, two hundred twenty-two million, five hundred forty-two thousand, five hundred thirteen".