42531133 has 2 divisors, whose sum is σ = 42531134. Its totient is φ = 42531132.

The previous prime is 42531119. The next prime is 42531169. The reversal of 42531133 is 33113524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32684089 + 9847044 = 5717^2 + 3138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42531133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42531173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21265566 + 21265567.

It is an arithmetic number, because the mean of its divisors is an integer number (21265567).

Almost surely, 2^42531133 is an apocalyptic number.

It is an amenable number.

42531133 is a deficient number, since it is larger than the sum of its proper divisors (1).

42531133 is an equidigital number, since it uses as much as digits as its factorization.

42531133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 22.

The square root of 42531133 is about 6521.5897601735. The cubic root of 42531133 is about 349.0617947901.

Adding to 42531133 its reverse (33113524), we get a palindrome (75644657).

The spelling of 42531133 in words is "forty-two million, five hundred thirty-one thousand, one hundred thirty-three".