42251133 has 4 divisors (see below), whose sum is σ = 56334848. Its totient is φ = 28167420.

The previous prime is 42251119. The next prime is 42251149. The reversal of 42251133 is 33115224.

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 de Polignac number, because none of the positive numbers 2^k-42251133 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 (42251113) 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, 7041853 + ... + 7041858.

It is an arithmetic number, because the mean of its divisors is an integer number (14083712).

Almost surely, 2^42251133 is an apocalyptic number.

It is an amenable number.

42251133 is a deficient number, since it is larger than the sum of its proper divisors (14083715).

42251133 is a wasteful number, since it uses less digits than its factorization.

42251133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14083714.

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

The square root of 42251133 is about 6500.0871532619. The cubic root of 42251133 is about 348.2941016893.

Adding to 42251133 its reverse (33115224), we get a palindrome (75366357).

The spelling of 42251133 in words is "forty-two million, two hundred fifty-one thousand, one hundred thirty-three".