212549138 has 8 divisors (see below), whose sum is σ = 319090188. Its totient is φ = 106185744.

The previous prime is 212549137. The next prime is 212549159. The reversal of 212549138 is 831945212.

212549138 is digitally balanced in base 2, 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 212197489 + 351649 = 14567^2 + 593^2 .

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 = 212549098 and 212549107.

It is not an unprimeable number, because it can be changed into a prime (212549137) 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, 41381 + ... + 46232.

Almost surely, 2^212549138 is an apocalyptic number.

212549138 is a deficient number, since it is larger than the sum of its proper divisors (106541050).

212549138 is a wasteful number, since it uses less digits than its factorization.

212549138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88828.

The product of its digits is 17280, while the sum is 35.

The square root of 212549138 is about 14579.0650591868. The cubic root of 212549138 is about 596.7875887929.

The spelling of 212549138 in words is "two hundred twelve million, five hundred forty-nine thousand, one hundred thirty-eight".