214545664 has 18 divisors (see below), whose sum is σ = 428253770. Its totient is φ = 107272704.

The previous prime is 214545659. The next prime is 214545689. The reversal of 214545664 is 466545412.

It can be written as a sum of positive squares in only one way, i.e., 209670400 + 4875264 = 14480^2 + 2208^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 418779 + ... + 419290.

Almost surely, 2^214545664 is an apocalyptic number.

It is an amenable number.

214545664 is a deficient number, since it is larger than the sum of its proper divisors (213708106).

214545664 is an frugal number, since it uses more digits than its factorization.

214545664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838085 (or 838071 counting only the distinct ones).

The product of its digits is 115200, while the sum is 37.

The square root of 214545664 is about 14647.3773761722. The cubic root of 214545664 is about 598.6503589841.

The spelling of 214545664 in words is "two hundred fourteen million, five hundred forty-five thousand, six hundred sixty-four".