217231048 has 8 divisors (see below), whose sum is σ = 407308230. Its totient is φ = 108615520.

The previous prime is 217231019. The next prime is 217231057. The reversal of 217231048 is 840132712.

217231048 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 216619524 + 611524 = 14718^2 + 782^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13576933 + ... + 13576948.

Almost surely, 2^217231048 is an apocalyptic number.

It is an amenable number.

217231048 is a deficient number, since it is larger than the sum of its proper divisors (190077182).

217231048 is a wasteful number, since it uses less digits than its factorization.

217231048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27153887 (or 27153883 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 217231048 is about 14738.7600563955. The cubic root of 217231048 is about 601.1377006246.

The spelling of 217231048 in words is "two hundred seventeen million, two hundred thirty-one thousand, forty-eight".