42433381 has 2 divisors, whose sum is σ = 42433382. Its totient is φ = 42433380.

The previous prime is 42433379. The next prime is 42433397. The reversal of 42433381 is 18333424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25664356 + 16769025 = 5066^2 + 4095^2 .

It is a cyclic number.

It is not a de Polignac number, because 42433381 - 2¹ = 42433379 is a prime.

It is a super-2 number, since 2×42433381² = 3601183646182322, which contains 22 as substring.

Together with 42433379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42433481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21216690 + 21216691.

It is an arithmetic number, because the mean of its divisors is an integer number (21216691).

Almost surely, 2^42433381 is an apocalyptic number.

It is an amenable number.

42433381 is a deficient number, since it is larger than the sum of its proper divisors (1).

42433381 is an equidigital number, since it uses as much as digits as its factorization.

42433381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 28.

The square root of 42433381 is about 6514.0909573017. The cubic root of 42433381 is about 348.7941660299.

The spelling of 42433381 in words is "forty-two million, four hundred thirty-three thousand, three hundred eighty-one".