42581633 has 2 divisors, whose sum is σ = 42581634. Its totient is φ = 42581632.

The previous prime is 42581593. The next prime is 42581639. The reversal of 42581633 is 33618524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40857664 + 1723969 = 6392^2 + 1313^2 .

It is a cyclic number.

It is not a de Polignac number, because 42581633 - 2⁸ = 42581377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42581633.

It is not a weakly prime, because it can be changed into another prime (42581639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21290816 + 21290817.

It is an arithmetic number, because the mean of its divisors is an integer number (21290817).

Almost surely, 2^42581633 is an apocalyptic number.

It is an amenable number.

42581633 is a deficient number, since it is larger than the sum of its proper divisors (1).

42581633 is an equidigital number, since it uses as much as digits as its factorization.

42581633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 42581633 is about 6525.4603669013. The cubic root of 42581633 is about 349.1998947903.

The spelling of 42581633 in words is "forty-two million, five hundred eighty-one thousand, six hundred thirty-three".