212400134 has 16 divisors (see below), whose sum is σ = 328593408. Its totient is φ = 102908232.

The previous prime is 212400113. The next prime is 212400157. The reversal of 212400134 is 431004212.

212400134 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212400134² = 90227633846435912, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1199 + ... + 20645.

It is an arithmetic number, because the mean of its divisors is an integer number (20537088).

Almost surely, 2^212400134 is an apocalyptic number.

212400134 is a deficient number, since it is larger than the sum of its proper divisors (116193274).

212400134 is a wasteful number, since it uses less digits than its factorization.

212400134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19619.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 212400134 is about 14573.9539590325. The cubic root of 212400134 is about 596.6481002237.

Adding to 212400134 its reverse (431004212), we get a palindrome (643404346).

The spelling of 212400134 in words is "two hundred twelve million, four hundred thousand, one hundred thirty-four".