42144255303421 has 4 divisors (see below), whose sum is σ = 42144562863100. Its totient is φ = 42143947743744.

The previous prime is 42144255303407. The next prime is 42144255303467. The reversal of 42144255303421 is 12430355244124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3839977291396 + 38304278012025 = 1959586^2 + 6189045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42144255303421 is a prime.

It is a super-2 number, since 2×42144255303421² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42144255303121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153574206 + ... + 153848383.

It is an arithmetic number, because the mean of its divisors is an integer number (10536140715775).

Almost surely, 2^{42144255303421} is an apocalyptic number.

It is an amenable number.

42144255303421 is a deficient number, since it is larger than the sum of its proper divisors (307559679).

42144255303421 is a wasteful number, since it uses less digits than its factorization.

42144255303421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307559678.

The product of its (nonzero) digits is 460800, while the sum is 40.

The spelling of 42144255303421 in words is "forty-two trillion, one hundred forty-four billion, two hundred fifty-five million, three hundred three thousand, four hundred twenty-one".