216464545 has 8 divisors (see below), whose sum is σ = 283371840. Its totient is φ = 157428720.

The previous prime is 216464527. The next prime is 216464551. The reversal of 216464545 is 545464612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-216464545 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1967805 + ... + 1967914.

It is an arithmetic number, because the mean of its divisors is an integer number (35421480).

Almost surely, 2^216464545 is an apocalyptic number.

It is an amenable number.

216464545 is a deficient number, since it is larger than the sum of its proper divisors (66907295).

216464545 is a wasteful number, since it uses less digits than its factorization.

216464545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935735.

The product of its digits is 115200, while the sum is 37.

The square root of 216464545 is about 14712.7341102869. The cubic root of 216464545 is about 600.4298262680.

The spelling of 216464545 in words is "two hundred sixteen million, four hundred sixty-four thousand, five hundred forty-five".