216739047 has 16 divisors (see below), whose sum is σ = 330524672. Its totient is φ = 123755040.

The previous prime is 216739027. The next prime is 216739057. The reversal of 216739047 is 740937612.

It is not a de Polignac number, because 216739047 - 2⁶ = 216738983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216738996 and 216739014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216739027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30858 + ... + 37224.

It is an arithmetic number, because the mean of its divisors is an integer number (20657792).

Almost surely, 2^216739047 is an apocalyptic number.

216739047 is a deficient number, since it is larger than the sum of its proper divisors (113785625).

216739047 is a wasteful number, since it uses less digits than its factorization.

216739047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7998.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 216739047 is about 14722.0598762537. The cubic root of 216739047 is about 600.6835238074.

It can be divided in two parts, 2167 and 39047, that added together give a palindrome (41214).

The spelling of 216739047 in words is "two hundred sixteen million, seven hundred thirty-nine thousand, forty-seven".