42217772 has 24 divisors (see below), whose sum is σ = 78939840. Its totient is φ = 19697040.

The previous prime is 42217757. The next prime is 42217793. The reversal of 42217772 is 27771224.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 947 + ... + 9237.

It is an arithmetic number, because the mean of its divisors is an integer number (3289160).

Almost surely, 2^42217772 is an apocalyptic number.

It is an amenable number.

42217772 is a deficient number, since it is larger than the sum of its proper divisors (36722068).

42217772 is a wasteful number, since it uses less digits than its factorization.

42217772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8381 (or 8379 counting only the distinct ones).

The product of its digits is 10976, while the sum is 32.

The square root of 42217772 is about 6497.5204501410. The cubic root of 42217772 is about 348.2024079032.

Adding to 42217772 its reverse (27771224), we get a palindrome (69988996).

The spelling of 42217772 in words is "forty-two million, two hundred seventeen thousand, seven hundred seventy-two".