42251919 has 16 divisors (see below), whose sum is σ = 60922368. Its totient is φ = 25945472.

The previous prime is 42251917. The next prime is 42251933. The reversal of 42251919 is 91915224.

42251919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 42251919 - 2¹ = 42251917 is a prime.

It is a super-2 number, since 2×42251919² = 3570449318365122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42251919.

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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6417 + ... + 11210.

It is an arithmetic number, because the mean of its divisors is an integer number (3807648).

Almost surely, 2^42251919 is an apocalyptic number.

42251919 is a deficient number, since it is larger than the sum of its proper divisors (18670449).

42251919 is a wasteful number, since it uses less digits than its factorization.

42251919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17694.

The product of its digits is 6480, while the sum is 33.

The square root of 42251919 is about 6500.1476137085. The cubic root of 42251919 is about 348.2962614536.

The spelling of 42251919 in words is "forty-two million, two hundred fifty-one thousand, nine hundred nineteen".