216260345 has 32 divisors (see below), whose sum is σ = 301916160. Its totient is φ = 145656000.

The previous prime is 216260333. The next prime is 216260347. The reversal of 216260345 is 543062612.

It is not a de Polignac number, because 216260345 - 2¹⁰ = 216259321 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216260347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 861470 + ... + 861720.

It is an arithmetic number, because the mean of its divisors is an integer number (9434880).

Almost surely, 2^216260345 is an apocalyptic number.

It is an amenable number.

216260345 is a deficient number, since it is larger than the sum of its proper divisors (85655815).

216260345 is a wasteful number, since it uses less digits than its factorization.

216260345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 216260345 is about 14705.7929061986. The cubic root of 216260345 is about 600.2409634000.

The spelling of 216260345 in words is "two hundred sixteen million, two hundred sixty thousand, three hundred forty-five".