216348959 has 4 divisors (see below), whose sum is σ = 216408480. Its totient is φ = 216289440.

The previous prime is 216348941. The next prime is 216348967. The reversal of 216348959 is 959843612.

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-216348959 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 (216348359) 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, 23927 + ... + 31704.

It is an arithmetic number, because the mean of its divisors is an integer number (54102120).

Almost surely, 2^216348959 is an apocalyptic number.

216348959 is a deficient number, since it is larger than the sum of its proper divisors (59521).

216348959 is an equidigital number, since it uses as much as digits as its factorization.

216348959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59520.

The product of its digits is 466560, while the sum is 47.

The square root of 216348959 is about 14708.8054919494. The cubic root of 216348959 is about 600.3229363409.

The spelling of 216348959 in words is "two hundred sixteen million, three hundred forty-eight thousand, nine hundred fifty-nine".