216687092 has 6 divisors (see below), whose sum is σ = 379202418. Its totient is φ = 108343544.

The previous prime is 216687089. The next prime is 216687103. The reversal of 216687092 is 290786612.

It can be written as a sum of positive squares in only one way, i.e., 182628196 + 34058896 = 13514^2 + 5836^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27085883 + ... + 27085890.

It is an arithmetic number, because the mean of its divisors is an integer number (63200403).

Almost surely, 2^216687092 is an apocalyptic number.

It is an amenable number.

216687092 is a deficient number, since it is larger than the sum of its proper divisors (162515326).

216687092 is a wasteful number, since it uses less digits than its factorization.

216687092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54171777 (or 54171775 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 216687092 is about 14720.2952416044. The cubic root of 216687092 is about 600.6355229097.

The spelling of 216687092 in words is "two hundred sixteen million, six hundred eighty-seven thousand, ninety-two".