212401422 has 24 divisors (see below), whose sum is σ = 468888264. Its totient is φ = 69464304.

The previous prime is 212401411. The next prime is 212401439. The reversal of 212401422 is 224104212.

212401422 is a `hidden beast` number, since 2 + 1 + 240 + 1 + 422 = 666.

It is a super-2 number, since 2×212401422² = 90228728135244168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212401395 and 212401404.

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, 110368 + ... + 112275.

It is an arithmetic number, because the mean of its divisors is an integer number (19537011).

Almost surely, 2^212401422 is an apocalyptic number.

212401422 is an abundant number, since it is smaller than the sum of its proper divisors (256486842).

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

212401422 is a wasteful number, since it uses less digits than its factorization.

212401422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222704 (or 222701 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 212401422 is about 14573.9981473856. The cubic root of 212401422 is about 596.6493062512.

Adding to 212401422 its reverse (224104212), we get a palindrome (436505634).

The spelling of 212401422 in words is "two hundred twelve million, four hundred one thousand, four hundred twenty-two".