42144426251 has 4 divisors (see below), whose sum is σ = 43503923904. Its totient is φ = 40784928600.

The previous prime is 42144426227. The next prime is 42144426341. The reversal of 42144426251 is 15262444124.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42144426251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42144426151) 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, 679748780 + ... + 679748841.

It is an arithmetic number, because the mean of its divisors is an integer number (10875980976).

Almost surely, 2^42144426251 is an apocalyptic number.

42144426251 is a deficient number, since it is larger than the sum of its proper divisors (1359497653).

42144426251 is a wasteful number, since it uses less digits than its factorization.

42144426251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359497652.

The product of its digits is 61440, while the sum is 35.

The spelling of 42144426251 in words is "forty-two billion, one hundred forty-four million, four hundred twenty-six thousand, two hundred fifty-one".