212158128 has 80 divisors (see below), whose sum is σ = 674567936. Its totient is φ = 55952640.

The previous prime is 212158127. The next prime is 212158151. The reversal of 212158128 is 821851212.

212158128 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 2×212158128² = 90022142552928768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212158095 and 212158104.

It is not an unprimeable number, because it can be changed into a prime (212158127) 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, 19918 + ... + 28653.

Almost surely, 2^212158128 is an apocalyptic number.

212158128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

212158128 is an abundant number, since it is smaller than the sum of its proper divisors (462409808).

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

212158128 is a wasteful number, since it uses less digits than its factorization.

212158128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48602 (or 48596 counting only the distinct ones).

The product of its digits is 2560, while the sum is 30.

The square root of 212158128 is about 14565.6489041855. The cubic root of 212158128 is about 596.4214096973.

The spelling of 212158128 in words is "two hundred twelve million, one hundred fifty-eight thousand, one hundred twenty-eight".