203052862391 has 4 divisors (see below), whose sum is σ = 214997148432. Its totient is φ = 191108576352.

The previous prime is 203052862351. The next prime is 203052862403. The reversal of 203052862391 is 193268250302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203052862391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203052862351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5972142995 + ... + 5972143028.

It is an arithmetic number, because the mean of its divisors is an integer number (53749287108).

Almost surely, 2^203052862391 is an apocalyptic number.

203052862391 is a deficient number, since it is larger than the sum of its proper divisors (11944286041).

203052862391 is a wasteful number, since it uses less digits than its factorization.

203052862391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11944286040.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 203052862391 in words is "two hundred three billion, fifty-two million, eight hundred sixty-two thousand, three hundred ninety-one".