42312113 has 4 divisors (see below), whose sum is σ = 42787620. Its totient is φ = 41836608.

The previous prime is 42312103. The next prime is 42312121. The reversal of 42312113 is 31121324.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7360369 + 34951744 = 2713^2 + 5912^2 .

It is a cyclic number.

It is not a de Polignac number, because 42312113 - 2⁴ = 42312097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42312091 and 42312100.

It is not an unprimeable number, because it can be changed into a prime (42312103) 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 3 ways as a sum of consecutive naturals, for example, 237620 + ... + 237797.

It is an arithmetic number, because the mean of its divisors is an integer number (10696905).

Almost surely, 2^42312113 is an apocalyptic number.

It is an amenable number.

42312113 is a deficient number, since it is larger than the sum of its proper divisors (475507).

42312113 is an equidigital number, since it uses as much as digits as its factorization.

42312113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475506.

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

The square root of 42312113 is about 6504.7761683243. The cubic root of 42312113 is about 348.4615825204.

Adding to 42312113 its reverse (31121324), we get a palindrome (73433437).

The spelling of 42312113 in words is "forty-two million, three hundred twelve thousand, one hundred thirteen".