442121256336251 has 16 divisors (see below), whose sum is σ = 469787708932800. Its totient is φ = 415285792242048.

The previous prime is 442121256336127. The next prime is 442121256336299. The reversal of 442121256336251 is 152633652121244.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442121256336251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442121256336196 and 442121256336205.

It is not an unprimeable number, because it can be changed into a prime (442121256330251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17693960 + ... + 34602293.

It is an arithmetic number, because the mean of its divisors is an integer number (29361731808300).

Almost surely, 2^{442121256336251} is an apocalyptic number.

442121256336251 is a deficient number, since it is larger than the sum of its proper divisors (27666452596549).

442121256336251 is a wasteful number, since it uses less digits than its factorization.

442121256336251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52304198.

The product of its digits is 2073600, while the sum is 47.

The spelling of 442121256336251 in words is "four hundred forty-two trillion, one hundred twenty-one billion, two hundred fifty-six million, three hundred thirty-six thousand, two hundred fifty-one".