42321131 has 4 divisors (see below), whose sum is σ = 42534000. Its totient is φ = 42108264.

The previous prime is 42321101. The next prime is 42321133. The reversal of 42321131 is 13112324.

42321131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42321131 - 2⁶ = 42321067 is a prime.

It is a super-2 number, since 2×42321131² = 3582156258238322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42321133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106136 + ... + 106533.

It is an arithmetic number, because the mean of its divisors is an integer number (10633500).

Almost surely, 2^42321131 is an apocalyptic number.

42321131 is a deficient number, since it is larger than the sum of its proper divisors (212869).

42321131 is a wasteful number, since it uses less digits than its factorization.

42321131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212868.

The product of its digits is 144, while the sum is 17.

The square root of 42321131 is about 6505.4693143539. The cubic root of 42321131 is about 348.4863366874.

Adding to 42321131 its reverse (13112324), we get a palindrome (55433455).

The spelling of 42321131 in words is "forty-two million, three hundred twenty-one thousand, one hundred thirty-one".