213681448 has 32 divisors (see below), whose sum is σ = 431560800. Its totient is φ = 98860608.

The previous prime is 213681443. The next prime is 213681473. The reversal of 213681448 is 844186312.

213681448 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×213681448² = 91319522438753408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213681443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9811 + ... + 22882.

It is an arithmetic number, because the mean of its divisors is an integer number (13486275).

Almost surely, 2^213681448 is an apocalyptic number.

It is an amenable number.

213681448 is an abundant number, since it is smaller than the sum of its proper divisors (217879352).

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

213681448 is a wasteful number, since it uses less digits than its factorization.

213681448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32761 (or 32757 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The square root of 213681448 is about 14617.8469002791. The cubic root of 213681448 is about 597.8454651525.

The spelling of 213681448 in words is "two hundred thirteen million, six hundred eighty-one thousand, four hundred forty-eight".