442720012231 has 8 divisors (see below), whose sum is σ = 506500018560. Its totient is φ = 379073578488.

The previous prime is 442720012213. The next prime is 442720012243. The reversal of 442720012231 is 132210027244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442720012231 is a prime.

It is a super-2 number, since 2×442720012231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442720012231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442720012291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33386041 + ... + 33399298.

It is an arithmetic number, because the mean of its divisors is an integer number (63312502320).

Almost surely, 2^442720012231 is an apocalyptic number.

442720012231 is a deficient number, since it is larger than the sum of its proper divisors (63780006329).

442720012231 is an equidigital number, since it uses as much as digits as its factorization.

442720012231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66786293.

The product of its (nonzero) digits is 5376, while the sum is 28.

Adding to 442720012231 its reverse (132210027244), we get a palindrome (574930039475).

The spelling of 442720012231 in words is "four hundred forty-two billion, seven hundred twenty million, twelve thousand, two hundred thirty-one".