216262506 has 16 divisors (see below), whose sum is σ = 433231200. Its totient is φ = 71969808.

The previous prime is 216262489. The next prime is 216262511. The reversal of 216262506 is 605262612.

It is a super-3 number, since 3×216262506³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 25401 + ... + 32828.

It is an arithmetic number, because the mean of its divisors is an integer number (27076950).

Almost surely, 2^216262506 is an apocalyptic number.

216262506 is an abundant number, since it is smaller than the sum of its proper divisors (216968694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216262506 is a wasteful number, since it uses less digits than its factorization.

216262506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58853.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 216262506 is about 14705.8663804619. The cubic root of 216262506 is about 600.2429627130.

The spelling of 216262506 in words is "two hundred sixteen million, two hundred sixty-two thousand, five hundred six".