216402547 has 2 divisors, whose sum is σ = 216402548. Its totient is φ = 216402546.

The previous prime is 216402541. The next prime is 216402559. The reversal of 216402547 is 745204612.

216402547 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216402547 - 2¹⁵ = 216369779 is a prime.

It is not a weakly prime, because it can be changed into another prime (216402541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108201273 + 108201274.

It is an arithmetic number, because the mean of its divisors is an integer number (108201274).

Almost surely, 2^216402547 is an apocalyptic number.

216402547 is a deficient number, since it is larger than the sum of its proper divisors (1).

216402547 is an equidigital number, since it uses as much as digits as its factorization.

216402547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 216402547 is about 14710.6270090707. The cubic root of 216402547 is about 600.3724973987.

The spelling of 216402547 in words is "two hundred sixteen million, four hundred two thousand, five hundred forty-seven".