202143322091 has 4 divisors (see below), whose sum is σ = 204702098400. Its totient is φ = 199584545784.

The previous prime is 202143322079. The next prime is 202143322111. The reversal of 202143322091 is 190223341202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 202143322091 - 2¹⁰ = 202143321067 is a prime.

It is a super-2 number, since 2×202143322091² (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 (202143322291) 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, 1279388036 + ... + 1279388193.

It is an arithmetic number, because the mean of its divisors is an integer number (51175524600).

Almost surely, 2^202143322091 is an apocalyptic number.

202143322091 is a deficient number, since it is larger than the sum of its proper divisors (2558776309).

202143322091 is an equidigital number, since it uses as much as digits as its factorization.

202143322091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558776308.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 202143322091 its reverse (190223341202), we get a palindrome (392366663293).

The spelling of 202143322091 in words is "two hundred two billion, one hundred forty-three million, three hundred twenty-two thousand, ninety-one".