42216013 has 4 divisors (see below), whose sum is σ = 48246880. Its totient is φ = 36185148.

The previous prime is 42216007. The next prime is 42216023. The reversal of 42216013 is 31061224.

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 42216013 - 2¹⁷ = 42084941 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 (42216023) 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, 3015423 + ... + 3015436.

It is an arithmetic number, because the mean of its divisors is an integer number (12061720).

Almost surely, 2^42216013 is an apocalyptic number.

It is an amenable number.

42216013 is a deficient number, since it is larger than the sum of its proper divisors (6030867).

42216013 is an equidigital number, since it uses as much as digits as its factorization.

42216013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6030866.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 42216013 is about 6497.3850894033. The cubic root of 42216013 is about 348.1975718944.

Adding to 42216013 its reverse (31061224), we get a palindrome (73277237).

The spelling of 42216013 in words is "forty-two million, two hundred sixteen thousand, thirteen".