213112422 has 24 divisors (see below), whose sum is σ = 462062640. Its totient is φ = 70988400.

The previous prime is 213112399. The next prime is 213112451. The reversal of 213112422 is 224211312.

It is a happy number.

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 = 213112395 and 213112404.

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, 30672 + ... + 36972.

It is an arithmetic number, because the mean of its divisors is an integer number (19252610).

Almost surely, 2^213112422 is an apocalyptic number.

213112422 is an abundant number, since it is smaller than the sum of its proper divisors (248950218).

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

213112422 is a wasteful number, since it uses less digits than its factorization.

213112422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8188 (or 8185 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 213112422 is about 14598.3705255073. The cubic root of 213112422 is about 597.3143130796.

Adding to 213112422 its reverse (224211312), we get a palindrome (437323734).

The spelling of 213112422 in words is "two hundred thirteen million, one hundred twelve thousand, four hundred twenty-two".