213724856 has 16 divisors (see below), whose sum is σ = 401241600. Its totient is φ = 106727104.

The previous prime is 213724829. The next prime is 213724859. The reversal of 213724856 is 658427312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213724859) 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, 10040 + ... + 22983.

It is an arithmetic number, because the mean of its divisors is an integer number (25077600).

Almost surely, 2^213724856 is an apocalyptic number.

It is an amenable number.

213724856 is a deficient number, since it is larger than the sum of its proper divisors (187516744).

213724856 is a wasteful number, since it uses less digits than its factorization.

213724856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33838 (or 33834 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 213724856 is about 14619.3315852675. The cubic root of 213724856 is about 597.8859452208.

The spelling of 213724856 in words is "two hundred thirteen million, seven hundred twenty-four thousand, eight hundred fifty-six".