42251916 has 72 divisors (see below), whose sum is σ = 115607856. Its totient is φ = 11975040.

The previous prime is 42251903. The next prime is 42251917. The reversal of 42251916 is 61915224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42251917) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 106230 + ... + 106626.

Almost surely, 2^42251916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42251916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57803928).

42251916 is an abundant number, since it is smaller than the sum of its proper divisors (73355940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42251916 is a wasteful number, since it uses less digits than its factorization.

42251916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 590 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 42251916 is about 6500.1473829445. The cubic root of 42251916 is about 348.2962532103.

The spelling of 42251916 in words is "forty-two million, two hundred fifty-one thousand, nine hundred sixteen".