42551630 has 32 divisors (see below), whose sum is σ = 83825280. Its totient is φ = 15423520.

The previous prime is 42551611. The next prime is 42551647. The reversal of 42551630 is 3615524.

It is a self number, because there is not a number n which added to its sum of digits gives 42551630.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64241 + ... + 64899.

It is an arithmetic number, because the mean of its divisors is an integer number (2619540).

Almost surely, 2^42551630 is an apocalyptic number.

42551630 is a deficient number, since it is larger than the sum of its proper divisors (41273650).

42551630 is a wasteful number, since it uses less digits than its factorization.

42551630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 42551630 is about 6523.1610435432. The cubic root of 42551630 is about 349.1178601557.

It can be divided in two parts, 4255 and 1630, that added together give a palindrome (5885).

The spelling of 42551630 in words is "forty-two million, five hundred fifty-one thousand, six hundred thirty".