216240003 has 32 divisors (see below), whose sum is σ = 368593920. Its totient is φ = 122731200.

The previous prime is 216239999. The next prime is 216240023. The reversal of 216240003 is 300042612.

It is a happy number.

It is not a de Polignac number, because 216240003 - 2² = 216239999 is a prime.

It is a super-3 number, since 3×216240003³ (a number of 26 digits) contains 333 as substring.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (216240023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24751 + ... + 32327.

It is an arithmetic number, because the mean of its divisors is an integer number (11518560).

Almost surely, 2^216240003 is an apocalyptic number.

216240003 is a deficient number, since it is larger than the sum of its proper divisors (152353917).

216240003 is a wasteful number, since it uses less digits than its factorization.

216240003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7744 (or 7738 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 216240003 is about 14705.1012577269. The cubic root of 216240003 is about 600.2221427442. Note that the first 3 decimals are identical.

Adding to 216240003 its reverse (300042612), we get a palindrome (516282615).

The spelling of 216240003 in words is "two hundred sixteen million, two hundred forty thousand, three".