202142442323 has 4 divisors (see below), whose sum is σ = 203931313608. Its totient is φ = 200353571040.

The previous prime is 202142442319. The next prime is 202142442353. The reversal of 202142442323 is 323244241202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323244241202 = 2 ⋅161622120601.

It is a cyclic number.

It is not a de Polignac number, because 202142442323 - 2² = 202142442319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202142442353) 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 3 ways as a sum of consecutive naturals, for example, 894435473 + ... + 894435698.

It is an arithmetic number, because the mean of its divisors is an integer number (50982828402).

Almost surely, 2^202142442323 is an apocalyptic number.

202142442323 is a deficient number, since it is larger than the sum of its proper divisors (1788871285).

202142442323 is a wasteful number, since it uses less digits than its factorization.

202142442323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788871284.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 202142442323 its reverse (323244241202), we get a palindrome (525386683525).

The spelling of 202142442323 in words is "two hundred two billion, one hundred forty-two million, four hundred forty-two thousand, three hundred twenty-three".