213655842 has 12 divisors (see below), whose sum is σ = 462921030. Its totient is φ = 71218608.

The previous prime is 213655837. The next prime is 213655853. The reversal of 213655842 is 248556312.

213655842 is a `hidden beast` number, since 2 + 13 + 65 + 584 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 200760561 + 12895281 = 14169^2 + 3591^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213655797 and 213655806.

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 in 5 ways as a sum of consecutive naturals, for example, 5934867 + ... + 5934902.

Almost surely, 2^213655842 is an apocalyptic number.

213655842 is an abundant number, since it is smaller than the sum of its proper divisors (249265188).

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

213655842 is a wasteful number, since it uses less digits than its factorization.

213655842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11869777 (or 11869774 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 213655842 is about 14616.9710268578. The cubic root of 213655842 is about 597.8215837429.

The spelling of 213655842 in words is "two hundred thirteen million, six hundred fifty-five thousand, eight hundred forty-two".