216455512 has 64 divisors (see below), whose sum is σ = 506479680. Its totient is φ = 84436992.

The previous prime is 216455489. The next prime is 216455521. The reversal of 216455512 is 215554612.

It is a super-3 number, since 3×216455512³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51108 + ... + 55180.

It is an arithmetic number, because the mean of its divisors is an integer number (7913745).

Almost surely, 2^216455512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216455512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253239840).

216455512 is an abundant number, since it is smaller than the sum of its proper divisors (290024168).

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

216455512 is a wasteful number, since it uses less digits than its factorization.

216455512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4172 (or 4168 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

The square root of 216455512 is about 14712.4271281118. The cubic root of 216455512 is about 600.4214742335.

The spelling of 216455512 in words is "two hundred sixteen million, four hundred fifty-five thousand, five hundred twelve".