42123204343 has 4 divisors (see below), whose sum is σ = 45952586568. Its totient is φ = 38293822120.

The previous prime is 42123204337. The next prime is 42123204413. The reversal of 42123204343 is 34340232124.

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 42123204343 - 2⁵ = 42123204311 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 (42123204743) 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, 1914691096 + ... + 1914691117.

It is an arithmetic number, because the mean of its divisors is an integer number (11488146642).

Almost surely, 2^42123204343 is an apocalyptic number.

42123204343 is a deficient number, since it is larger than the sum of its proper divisors (3829382225).

42123204343 is a wasteful number, since it uses less digits than its factorization.

42123204343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3829382224.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 42123204343 its reverse (34340232124), we get a palindrome (76463436467).

The spelling of 42123204343 in words is "forty-two billion, one hundred twenty-three million, two hundred four thousand, three hundred forty-three".