42217646 has 8 divisors (see below), whose sum is σ = 63789120. Its totient is φ = 20954608.

The previous prime is 42217633. The next prime is 42217661. The reversal of 42217646 is 64671224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76766 + ... + 77313.

It is an arithmetic number, because the mean of its divisors is an integer number (7973640).

Almost surely, 2^42217646 is an apocalyptic number.

42217646 is a deficient number, since it is larger than the sum of its proper divisors (21571474).

42217646 is a wasteful number, since it uses less digits than its factorization.

42217646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154218.

The product of its digits is 16128, while the sum is 32.

The square root of 42217646 is about 6497.5107541273. The cubic root of 42217646 is about 348.2020614965.

The spelling of 42217646 in words is "forty-two million, two hundred seventeen thousand, six hundred forty-six".