216147131 has 2 divisors, whose sum is σ = 216147132. Its totient is φ = 216147130.

The previous prime is 216147119. The next prime is 216147143. The reversal of 216147131 is 131741612.

216147131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (216147119) and next prime (216147143).

It is a cyclic number.

It is not a de Polignac number, because 216147131 - 2⁶ = 216147067 is a prime.

It is a super-2 number, since 2×216147131² = 93439164479062322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216147131.

It is not a weakly prime, because it can be changed into another prime (216147101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108073565 + 108073566.

It is an arithmetic number, because the mean of its divisors is an integer number (108073566).

Almost surely, 2^216147131 is an apocalyptic number.

216147131 is a deficient number, since it is larger than the sum of its proper divisors (1).

216147131 is an equidigital number, since it uses as much as digits as its factorization.

216147131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 216147131 is about 14701.9431028691. The cubic root of 216147131 is about 600.1362014870.

Adding to 216147131 its reverse (131741612), we get a palindrome (347888743).

The spelling of 216147131 in words is "two hundred sixteen million, one hundred forty-seven thousand, one hundred thirty-one".