42323131 has 4 divisors (see below), whose sum is σ = 42656512. Its totient is φ = 41989752.

The previous prime is 42323129. The next prime is 42323147. The reversal of 42323131 is 13132324.

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 42323131 - 2¹ = 42323129 is a prime.

It is a super-2 number, since 2×42323131² = 3582494835286322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42323099 and 42323108.

It is not an unprimeable number, because it can be changed into a prime (42323161) 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, 166500 + ... + 166753.

It is an arithmetic number, because the mean of its divisors is an integer number (10664128).

Almost surely, 2^42323131 is an apocalyptic number.

42323131 is a deficient number, since it is larger than the sum of its proper divisors (333381).

42323131 is a wasteful number, since it uses less digits than its factorization.

42323131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333380.

The product of its digits is 432, while the sum is 19.

The square root of 42323131 is about 6505.6230293493. The cubic root of 42323131 is about 348.4918261571.

Adding to 42323131 its reverse (13132324), we get a palindrome (55455455).

The spelling of 42323131 in words is "forty-two million, three hundred twenty-three thousand, one hundred thirty-one".