442217761 has 4 divisors (see below), whose sum is σ = 465492400. Its totient is φ = 418943124.

The previous prime is 442217729. The next prime is 442217767. The reversal of 442217761 is 167712244.

It is a happy number.

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 442217761 - 2⁵ = 442217729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (442217767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11637291 + ... + 11637328.

It is an arithmetic number, because the mean of its divisors is an integer number (116373100).

Almost surely, 2^442217761 is an apocalyptic number.

It is an amenable number.

442217761 is a deficient number, since it is larger than the sum of its proper divisors (23274639).

442217761 is a wasteful number, since it uses less digits than its factorization.

442217761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23274638.

The product of its digits is 18816, while the sum is 34.

The square root of 442217761 is about 21028.9743211598. The cubic root of 442217761 is about 761.8662359377.

The spelling of 442217761 in words is "four hundred forty-two million, two hundred seventeen thousand, seven hundred sixty-one".