201972819147 has 16 divisors (see below), whose sum is σ = 293791743360. Its totient is φ = 122402312000.

The previous prime is 201972819143. The next prime is 201972819151. The reversal of 201972819147 is 741918279102.

It is an interprime number because it is at equal distance from previous prime (201972819143) and next prime (201972819151).

It is a cyclic number.

It is not a de Polignac number, because 201972819147 - 2² = 201972819143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201972819147.

It is not an unprimeable number, because it can be changed into a prime (201972819143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 689647 + ... + 937847.

It is an arithmetic number, because the mean of its divisors is an integer number (18361983960).

Almost surely, 2^201972819147 is an apocalyptic number.

201972819147 is a deficient number, since it is larger than the sum of its proper divisors (91818924213).

201972819147 is a wasteful number, since it uses less digits than its factorization.

201972819147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272874.

The product of its (nonzero) digits is 508032, while the sum is 51.

The spelling of 201972819147 in words is "two hundred one billion, nine hundred seventy-two million, eight hundred nineteen thousand, one hundred forty-seven".