216479351 has 4 divisors (see below), whose sum is σ = 236159304. Its totient is φ = 196799400.

The previous prime is 216479339. The next prime is 216479353. The reversal of 216479351 is 153974612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216479351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216479353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9839960 + ... + 9839981.

It is an arithmetic number, because the mean of its divisors is an integer number (59039826).

Almost surely, 2^216479351 is an apocalyptic number.

216479351 is a deficient number, since it is larger than the sum of its proper divisors (19679953).

216479351 is a wasteful number, since it uses less digits than its factorization.

216479351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19679952.

The product of its digits is 45360, while the sum is 38.

The square root of 216479351 is about 14713.2372712466. The cubic root of 216479351 is about 600.4435155943.

The spelling of 216479351 in words is "two hundred sixteen million, four hundred seventy-nine thousand, three hundred fifty-one".