213136828 has 6 divisors (see below), whose sum is σ = 372989456. Its totient is φ = 106568412.

The previous prime is 213136801. The next prime is 213136829. The reversal of 213136828 is 828631312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 213136793 and 213136802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213136829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26642100 + ... + 26642107.

Almost surely, 2^213136828 is an apocalyptic number.

It is an amenable number.

213136828 is a deficient number, since it is larger than the sum of its proper divisors (159852628).

213136828 is a wasteful number, since it uses less digits than its factorization.

213136828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53284211 (or 53284209 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 213136828 is about 14599.2064167886. The cubic root of 213136828 is about 597.3371140290.

The spelling of 213136828 in words is "two hundred thirteen million, one hundred thirty-six thousand, eight hundred twenty-eight".