622138212 has 48 divisors (see below), whose sum is σ = 1629606720. Its totient is φ = 205238016.

The previous prime is 622138211. The next prime is 622138243. The reversal of 622138212 is 212831226.

622138212 is a `hidden beast` number, since 622 + 1 + 38 + 2 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (622138211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19218 + ... + 40169.

It is an arithmetic number, because the mean of its divisors is an integer number (33950140).

Almost surely, 2^622138212 is an apocalyptic number.

It is an amenable number.

622138212 is an abundant number, since it is smaller than the sum of its proper divisors (1007468508).

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

622138212 is a wasteful number, since it uses less digits than its factorization.

622138212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59497 (or 59489 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 622138212 is about 24942.6985709245. The cubic root of 622138212 is about 853.6810195456.

Adding to 622138212 its reverse (212831226), we get a palindrome (834969438).

The spelling of 622138212 in words is "six hundred twenty-two million, one hundred thirty-eight thousand, two hundred twelve".