191948231201 has 4 divisors (see below), whose sum is σ = 192114709572. Its totient is φ = 191781752832.

The previous prime is 191948231161. The next prime is 191948231213. The reversal of 191948231201 is 102132849191.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 143262250000 + 48685981201 = 378500^2 + 220649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191948231201 is a prime.

It is a super-2 number, since 2×191948231201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191948231231) 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 in 3 ways as a sum of consecutive naturals, for example, 83237456 + ... + 83239761.

It is an arithmetic number, because the mean of its divisors is an integer number (48028677393).

Almost surely, 2^191948231201 is an apocalyptic number.

It is an amenable number.

191948231201 is a deficient number, since it is larger than the sum of its proper divisors (166478371).

191948231201 is a wasteful number, since it uses less digits than its factorization.

191948231201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166478370.

The product of its (nonzero) digits is 31104, while the sum is 41.

The spelling of 191948231201 in words is "one hundred ninety-one billion, nine hundred forty-eight million, two hundred thirty-one thousand, two hundred one".