213236930 has 8 divisors (see below), whose sum is σ = 383826492. Its totient is φ = 85294768.

The previous prime is 213236911. The next prime is 213236939. The reversal of 213236930 is 39632312.

It can be written as a sum of positive squares in 2 ways, for example, as 207849889 + 5387041 = 14417^2 + 2321^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 213236893 and 213236902.

It is not an unprimeable number, because it can be changed into a prime (213236939) 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, 10661837 + ... + 10661856.

Almost surely, 2^213236930 is an apocalyptic number.

213236930 is a deficient number, since it is larger than the sum of its proper divisors (170589562).

213236930 is a wasteful number, since it uses less digits than its factorization.

213236930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21323700.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 213236930 is about 14602.6343513765. The cubic root of 213236930 is about 597.4306146561.

The spelling of 213236930 in words is "two hundred thirteen million, two hundred thirty-six thousand, nine hundred thirty".