442125566 has 4 divisors (see below), whose sum is σ = 663188352. Its totient is φ = 221062782.

The previous prime is 442125557. The next prime is 442125577. The reversal of 442125566 is 665521244.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×442125566² = 390950032221640712, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 110531390 + ... + 110531393.

It is an arithmetic number, because the mean of its divisors is an integer number (165797088).

Almost surely, 2^442125566 is an apocalyptic number.

442125566 is a deficient number, since it is larger than the sum of its proper divisors (221062786).

442125566 is a wasteful number, since it uses less digits than its factorization.

442125566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221062785.

The product of its digits is 57600, while the sum is 35.

The square root of 442125566 is about 21026.7821123442. The cubic root of 442125566 is about 761.8132868059.

The spelling of 442125566 in words is "four hundred forty-two million, one hundred twenty-five thousand, five hundred sixty-six".