442951381 has 4 divisors (see below), whose sum is σ = 443027200. Its totient is φ = 442875564.

The previous prime is 442951349. The next prime is 442951393. The reversal of 442951381 is 183159244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 442951381 - 2⁵ = 442951349 is a prime.

It is a super-2 number, since 2×442951381² = 392411851859614322, which 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 442951381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442951981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28341 + ... + 41098.

It is an arithmetic number, because the mean of its divisors is an integer number (110756800).

Almost surely, 2^442951381 is an apocalyptic number.

It is an amenable number.

442951381 is a deficient number, since it is larger than the sum of its proper divisors (75819).

442951381 is an equidigital number, since it uses as much as digits as its factorization.

442951381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75818.

The product of its digits is 34560, while the sum is 37.

The square root of 442951381 is about 21046.4101689576. The cubic root of 442951381 is about 762.2873041436.

The spelling of 442951381 in words is "four hundred forty-two million, nine hundred fifty-one thousand, three hundred eighty-one".