216092257 has 4 divisors (see below), whose sum is σ = 217212100. Its totient is φ = 214972416.

The previous prime is 216092231. The next prime is 216092269. The reversal of 216092257 is 752290612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63297936 + 152794321 = 7956^2 + 12361^2 .

It is a cyclic number.

It is not a de Polignac number, because 216092257 - 2¹⁹ = 215567969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216092207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 559632 + ... + 560017.

It is an arithmetic number, because the mean of its divisors is an integer number (54303025).

Almost surely, 2^216092257 is an apocalyptic number.

It is an amenable number.

216092257 is a deficient number, since it is larger than the sum of its proper divisors (1119843).

216092257 is a wasteful number, since it uses less digits than its factorization.

216092257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119842.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 216092257 is about 14700.0767685070. The cubic root of 216092257 is about 600.0854109892.

The spelling of 216092257 in words is "two hundred sixteen million, ninety-two thousand, two hundred fifty-seven".