42312013 has 4 divisors (see below), whose sum is σ = 42331680. Its totient is φ = 42292348.

The previous prime is 42311999. The next prime is 42312037. The reversal of 42312013 is 31021324.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42312013 - 2⁵ = 42311981 is a prime.

It is a super-2 number, since 2×42312013² = 3580612888224338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42313013) 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, 6145 + ... + 11062.

It is an arithmetic number, because the mean of its divisors is an integer number (10582920).

Almost surely, 2^42312013 is an apocalyptic number.

It is an amenable number.

42312013 is a deficient number, since it is larger than the sum of its proper divisors (19667).

42312013 is a wasteful number, since it uses less digits than its factorization.

42312013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19666.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 42312013 is about 6504.7684816602. The cubic root of 42312013 is about 348.4613080034.

Adding to 42312013 its reverse (31021324), we get a palindrome (73333337).

The spelling of 42312013 in words is "forty-two million, three hundred twelve thousand, thirteen".