213667636 has 36 divisors (see below), whose sum is σ = 468430788. Its totient is φ = 84526848.

The previous prime is 213667627. The next prime is 213667661. The reversal of 213667636 is 636766312.

213667636 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 60155536 + 153512100 = 7756^2 + 12390^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39381 + ... + 44476.

Almost surely, 2^213667636 is an apocalyptic number.

213667636 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

213667636 is an abundant number, since it is smaller than the sum of its proper divisors (254763152).

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

213667636 is a wasteful number, since it uses less digits than its factorization.

213667636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83888 (or 83879 counting only the distinct ones).

The product of its digits is 163296, while the sum is 40.

The square root of 213667636 is about 14617.3744564474. The cubic root of 213667636 is about 597.8325836419.

The spelling of 213667636 in words is "two hundred thirteen million, six hundred sixty-seven thousand, six hundred thirty-six".