217132442 has 4 divisors (see below), whose sum is σ = 325698666. Its totient is φ = 108566220.

The previous prime is 217132411. The next prime is 217132451. The reversal of 217132442 is 244231712.

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

It can be written as a sum of positive squares in only one way, i.e., 125910841 + 91221601 = 11221^2 + 9551^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54283109 + ... + 54283112.

Almost surely, 2^217132442 is an apocalyptic number.

217132442 is a deficient number, since it is larger than the sum of its proper divisors (108566224).

217132442 is a wasteful number, since it uses less digits than its factorization.

217132442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108566223.

The product of its digits is 2688, while the sum is 26.

The square root of 217132442 is about 14735.4145513453. The cubic root of 217132442 is about 601.0467302717.

The spelling of 217132442 in words is "two hundred seventeen million, one hundred thirty-two thousand, four hundred forty-two".