42551143 has 2 divisors, whose sum is σ = 42551144. Its totient is φ = 42551142.

The previous prime is 42551141. The next prime is 42551161. The reversal of 42551143 is 34115524.

It is a happy number.

42551143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42551143 - 2¹ = 42551141 is a prime.

Together with 42551141, 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 (42551141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21275571 + 21275572.

It is an arithmetic number, because the mean of its divisors is an integer number (21275572).

Almost surely, 2^42551143 is an apocalyptic number.

42551143 is a deficient number, since it is larger than the sum of its proper divisors (1).

42551143 is an equidigital number, since it uses as much as digits as its factorization.

42551143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 25.

The square root of 42551143 is about 6523.1237149084. The cubic root of 42551143 is about 349.1165282753.

Adding to 42551143 its reverse (34115524), we get a palindrome (76666667).

The spelling of 42551143 in words is "forty-two million, five hundred fifty-one thousand, one hundred forty-three".