217053479 has 4 divisors (see below), whose sum is σ = 218144400. Its totient is φ = 215962560.

The previous prime is 217053469. The next prime is 217053481. The reversal of 217053479 is 974350712.

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

It is a cyclic number.

It is not a de Polignac number, because 217053479 - 2⁸ = 217053223 is a prime.

It is a super-2 number, since 2×217053479² = 94224425492006882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217053439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545162 + ... + 545559.

It is an arithmetic number, because the mean of its divisors is an integer number (54536100).

Almost surely, 2^217053479 is an apocalyptic number.

217053479 is a deficient number, since it is larger than the sum of its proper divisors (1090921).

217053479 is a wasteful number, since it uses less digits than its factorization.

217053479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090920.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 217053479 is about 14732.7349463703. The cubic root of 217053479 is about 600.9738619847.

The spelling of 217053479 in words is "two hundred seventeen million, fifty-three thousand, four hundred seventy-nine".