42312131 has 8 divisors (see below), whose sum is σ = 43843680. Its totient is φ = 40785472.

The previous prime is 42312121. The next prime is 42312143. The reversal of 42312131 is 13121324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42312131 - 2¹⁰ = 42311107 is a prime.

It is a super-2 number, since 2×42312131² = 3580632859522322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42312121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33986 + ... + 35208.

It is an arithmetic number, because the mean of its divisors is an integer number (5480460).

Almost surely, 2^42312131 is an apocalyptic number.

42312131 is a deficient number, since it is larger than the sum of its proper divisors (1531549).

42312131 is a wasteful number, since it uses less digits than its factorization.

42312131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445.

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

The square root of 42312131 is about 6504.7775519229. Note that the first 3 decimals coincide. The cubic root of 42312131 is about 348.4616319334.

Adding to 42312131 its reverse (13121324), we get a palindrome (55433455).

The spelling of 42312131 in words is "forty-two million, three hundred twelve thousand, one hundred thirty-one".