216249795 has 72 divisors (see below), whose sum is σ = 403981344. Its totient is φ = 106799616.

The previous prime is 216249757. The next prime is 216249851. The reversal of 216249795 is 597942612.

It is not a de Polignac number, because 216249795 - 2⁹ = 216249283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 216249795.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1913659 + ... + 1913771.

It is an arithmetic number, because the mean of its divisors is an integer number (5610852).

Almost surely, 2^216249795 is an apocalyptic number.

216249795 is a deficient number, since it is larger than the sum of its proper divisors (187731549).

216249795 is a wasteful number, since it uses less digits than its factorization.

216249795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 187 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 216249795 is about 14705.4341996420. The cubic root of 216249795 is about 600.2312025642.

The spelling of 216249795 in words is "two hundred sixteen million, two hundred forty-nine thousand, seven hundred ninety-five".