442130721187 has 16 divisors (see below), whose sum is σ = 472491418752. Its totient is φ = 413084430720.

The previous prime is 442130721161. The next prime is 442130721203. The reversal of 442130721187 is 781127031244.

It is a cyclic number.

It is not a de Polignac number, because 442130721187 - 2²³ = 442122332579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442130721287) 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, 2306364 + ... + 2490697.

It is an arithmetic number, because the mean of its divisors is an integer number (29530713672).

Almost surely, 2^442130721187 is an apocalyptic number.

442130721187 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

442130721187 is a deficient number, since it is larger than the sum of its proper divisors (30360697565).

442130721187 is a wasteful number, since it uses less digits than its factorization.

442130721187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4797198.

The product of its (nonzero) digits is 75264, while the sum is 40.

The spelling of 442130721187 in words is "four hundred forty-two billion, one hundred thirty million, seven hundred twenty-one thousand, one hundred eighty-seven".