213127688 has 16 divisors (see below), whose sum is σ = 399795180. Its totient is φ = 106515648.

The previous prime is 213127687. The next prime is 213127709. The reversal of 213127688 is 886721312.

It can be written as a sum of positive squares in 2 ways, for example, as 157803844 + 55323844 = 12562^2 + 7438^2 .

It is a super-2 number, since 2×213127688² = 90846822784450688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213127687) 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, 18770 + ... + 27902.

Almost surely, 2^213127688 is an apocalyptic number.

It is an amenable number.

213127688 is a deficient number, since it is larger than the sum of its proper divisors (186667492).

213127688 is a wasteful number, since it uses less digits than its factorization.

213127688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12056 (or 12052 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The square root of 213127688 is about 14598.8933827191. The cubic root of 213127688 is about 597.3285753213.

It can be divided in two parts, 2 and 13127688, that multiplied together give a square (26255376 = 5124²).

The spelling of 213127688 in words is "two hundred thirteen million, one hundred twenty-seven thousand, six hundred eighty-eight".