216668148 has 12 divisors (see below), whose sum is σ = 505559040. Its totient is φ = 72222712.

The previous prime is 216668143. The next prime is 216668171. The reversal of 216668148 is 841866612.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216668143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9027828 + ... + 9027851.

It is an arithmetic number, because the mean of its divisors is an integer number (42129920).

Almost surely, 2^216668148 is an apocalyptic number.

It is an amenable number.

216668148 is an abundant number, since it is smaller than the sum of its proper divisors (288890892).

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

216668148 is a wasteful number, since it uses less digits than its factorization.

216668148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18055686 (or 18055684 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 216668148 is about 14719.6517621851. The cubic root of 216668148 is about 600.6180187583.

The spelling of 216668148 in words is "two hundred sixteen million, six hundred sixty-eight thousand, one hundred forty-eight".