216041247 has 12 divisors (see below), whose sum is σ = 312379080. Its totient is φ = 143880048.

The previous prime is 216041233. The next prime is 216041249. The reversal of 216041247 is 742140612.

216041247 is a `hidden beast` number, since 2 + 1 + 604 + 12 + 47 = 666.

216041247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216041247 - 2⁶ = 216041183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216041247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216041249) 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, 2608 + ... + 20949.

It is an arithmetic number, because the mean of its divisors is an integer number (26031590).

Almost surely, 2^216041247 is an apocalyptic number.

216041247 is a deficient number, since it is larger than the sum of its proper divisors (96337833).

216041247 is a wasteful number, since it uses less digits than its factorization.

216041247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24582 (or 24579 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 216041247 is about 14698.3416411512. The cubic root of 216041247 is about 600.0381892359.

Adding to 216041247 its reverse (742140612), we get a palindrome (958181859).

The spelling of 216041247 in words is "two hundred sixteen million, forty-one thousand, two hundred forty-seven".