42343131434 has 4 divisors (see below), whose sum is σ = 63514697154. Its totient is φ = 21171565716.

The previous prime is 42343131433. The next prime is 42343131461. The reversal of 42343131434 is 43413134324.

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

It can be written as a sum of positive squares in only one way, i.e., 40459311025 + 1883820409 = 201145^2 + 43403^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42343131434.

It is not an unprimeable number, because it can be changed into a prime (42343131433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10585782857 + ... + 10585782860.

Almost surely, 2^42343131434 is an apocalyptic number.

42343131434 is a deficient number, since it is larger than the sum of its proper divisors (21171565720).

42343131434 is a wasteful number, since it uses less digits than its factorization.

42343131434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21171565719.

The product of its digits is 41472, while the sum is 32.

Adding to 42343131434 its reverse (43413134324), we get a palindrome (85756265758).

The spelling of 42343131434 in words is "forty-two billion, three hundred forty-three million, one hundred thirty-one thousand, four hundred thirty-four".