213136228 has 6 divisors (see below), whose sum is σ = 372988406. Its totient is φ = 106568112.

The previous prime is 213136219. The next prime is 213136229. The reversal of 213136228 is 822631312.

It can be written as a sum of positive squares in only one way, i.e., 212926464 + 209764 = 14592^2 + 458^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213136196 and 213136205.

It is not an unprimeable number, because it can be changed into a prime (213136229) by changing a digit.

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 as a sum of consecutive naturals, namely, 26642025 + ... + 26642032.

Almost surely, 2^213136228 is an apocalyptic number.

It is an amenable number.

213136228 is a deficient number, since it is larger than the sum of its proper divisors (159852178).

213136228 is a wasteful number, since it uses less digits than its factorization.

213136228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53284061 (or 53284059 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 213136228 is about 14599.1858677119. The cubic root of 213136228 is about 597.3365535087.

The spelling of 213136228 in words is "two hundred thirteen million, one hundred thirty-six thousand, two hundred twenty-eight".