213660464 has 20 divisors (see below), whose sum is σ = 423595656. Its totient is φ = 104345472.

The previous prime is 213660451. The next prime is 213660481. The reversal of 213660464 is 464066312.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 213660464.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154589 + ... + 155964.

Almost surely, 2^213660464 is an apocalyptic number.

It is an amenable number.

213660464 is a deficient number, since it is larger than the sum of its proper divisors (209935192).

213660464 is a wasteful number, since it uses less digits than its factorization.

213660464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310604 (or 310598 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 213660464 is about 14617.1291298941. The cubic root of 213660464 is about 597.8258945876.

The spelling of 213660464 in words is "two hundred thirteen million, six hundred sixty thousand, four hundred sixty-four".