42442551 has 24 divisors (see below), whose sum is σ = 63011520. Its totient is φ = 27516096.

The previous prime is 42442541. The next prime is 42442571. The reversal of 42442551 is 15524424.

It is not a de Polignac number, because 42442551 - 2¹⁰ = 42441527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42442541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113601 + ... + 113973.

It is an arithmetic number, because the mean of its divisors is an integer number (2625480).

Almost surely, 2^42442551 is an apocalyptic number.

42442551 is a deficient number, since it is larger than the sum of its proper divisors (20568969).

42442551 is a wasteful number, since it uses less digits than its factorization.

42442551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695 (or 692 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 42442551 is about 6514.7947780417. The cubic root of 42442551 is about 348.8192894277.

Adding to 42442551 its reverse (15524424), we get a palindrome (57966975).

The spelling of 42442551 in words is "forty-two million, four hundred forty-two thousand, five hundred fifty-one".