217772042 has 8 divisors (see below), whose sum is σ = 329152032. Its totient is φ = 108054700.

The previous prime is 217772039. The next prime is 217772089. The reversal of 217772042 is 240277712.

It is a happy number.

217772042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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, 415334 + ... + 415857.

It is an arithmetic number, because the mean of its divisors is an integer number (41144004).

Almost surely, 2^217772042 is an apocalyptic number.

217772042 is a deficient number, since it is larger than the sum of its proper divisors (111379990).

217772042 is a wasteful number, since it uses less digits than its factorization.

217772042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831324.

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

The square root of 217772042 is about 14757.1014091521. The cubic root of 217772042 is about 601.6363130390.

The spelling of 217772042 in words is "two hundred seventeen million, seven hundred seventy-two thousand, forty-two".