42551071 has 4 divisors (see below), whose sum is σ = 43588944. Its totient is φ = 41513200.

The previous prime is 42551057. The next prime is 42551107. The reversal of 42551071 is 17015524.

42551071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42551071 - 2⁵ = 42551039 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 (42551021) 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 in 3 ways as a sum of consecutive naturals, for example, 518875 + ... + 518956.

It is an arithmetic number, because the mean of its divisors is an integer number (10897236).

Almost surely, 2^42551071 is an apocalyptic number.

42551071 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

42551071 is a deficient number, since it is larger than the sum of its proper divisors (1037873).

42551071 is a wasteful number, since it uses less digits than its factorization.

42551071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037872.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 42551071 is about 6523.1181960777. The cubic root of 42551071 is about 349.1163313640.

Adding to 42551071 its reverse (17015524), we get a palindrome (59566595).

The spelling of 42551071 in words is "forty-two million, five hundred fifty-one thousand, seventy-one".