42136213 has 4 divisors (see below), whose sum is σ = 48155680. Its totient is φ = 36116748.

The previous prime is 42136201. The next prime is 42136261. The reversal of 42136213 is 31263124.

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 42136213 - 2⁵ = 42136181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42136513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3009723 + ... + 3009736.

It is an arithmetic number, because the mean of its divisors is an integer number (12038920).

Almost surely, 2^42136213 is an apocalyptic number.

It is an amenable number.

42136213 is a deficient number, since it is larger than the sum of its proper divisors (6019467).

42136213 is an equidigital number, since it uses as much as digits as its factorization.

42136213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6019466.

The product of its digits is 864, while the sum is 22.

The square root of 42136213 is about 6491.2412526419. The cubic root of 42136213 is about 347.9780367739.

Adding to 42136213 its reverse (31263124), we get a palindrome (73399337).

The spelling of 42136213 in words is "forty-two million, one hundred thirty-six thousand, two hundred thirteen".