42215133 has 4 divisors (see below), whose sum is σ = 56286848. Its totient is φ = 28143420.

The previous prime is 42215123. The next prime is 42215137. The reversal of 42215133 is 33151224.

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 not a de Polignac number, because 42215133 - 2⁵ = 42215101 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 (42215137) 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, 7035853 + ... + 7035858.

It is an arithmetic number, because the mean of its divisors is an integer number (14071712).

Almost surely, 2^42215133 is an apocalyptic number.

It is an amenable number.

42215133 is a deficient number, since it is larger than the sum of its proper divisors (14071715).

42215133 is a wasteful number, since it uses less digits than its factorization.

42215133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14071714.

The product of its digits is 720, while the sum is 21.

The square root of 42215133 is about 6497.3173694995. The cubic root of 42215133 is about 348.1951524650.

Adding to 42215133 its reverse (33151224), we get a palindrome (75366357).

The spelling of 42215133 in words is "forty-two million, two hundred fifteen thousand, one hundred thirty-three".