42131213 has 4 divisors (see below), whose sum is σ = 42160608. Its totient is φ = 42101820.

The previous prime is 42131183. The next prime is 42131267. The reversal of 42131213 is 31213124.

42131213 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, 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 42131213 - 2¹⁴ = 42114829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42131191 and 42131200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42131273) 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, 12431 + ... + 15452.

It is an arithmetic number, because the mean of its divisors is an integer number (10540152).

Almost surely, 2^42131213 is an apocalyptic number.

It is an amenable number.

42131213 is a deficient number, since it is larger than the sum of its proper divisors (29395).

42131213 is a wasteful number, since it uses less digits than its factorization.

42131213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29394.

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

The square root of 42131213 is about 6490.8561068629. The cubic root of 42131213 is about 347.9642722162.

Adding to 42131213 its reverse (31213124), we get a palindrome (73344337).

It can be divided in two parts, 4213121 and 3, that added together give a palindrome (4213124).

The spelling of 42131213 in words is "forty-two million, one hundred thirty-one thousand, two hundred thirteen".