216313245 has 12 divisors (see below), whose sum is σ = 374943036. Its totient is φ = 115367040.

The previous prime is 216313243. The next prime is 216313247. The reversal of 216313245 is 542313612.

216313245 is a `hidden beast` number, since 2 + 1 + 631 + 3 + 24 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (216313243) and next prime (216313247).

It can be written as a sum of positive squares in 2 ways, for example, as 145298916 + 71014329 = 12054^2 + 8427^2 .

It is not a de Polignac number, because 216313245 - 2¹ = 216313243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216313243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2403436 + ... + 2403525.

It is an arithmetic number, because the mean of its divisors is an integer number (31245253).

Almost surely, 2^216313245 is an apocalyptic number.

It is an amenable number.

216313245 is a deficient number, since it is larger than the sum of its proper divisors (158629791).

216313245 is a wasteful number, since it uses less digits than its factorization.

216313245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4806972 (or 4806969 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 216313245 is about 14707.5914071611. The cubic root of 216313245 is about 600.2899015726.

Adding to 216313245 its reverse (542313612), we get a palindrome (758626857).

The spelling of 216313245 in words is "two hundred sixteen million, three hundred thirteen thousand, two hundred forty-five".