212228508 has 24 divisors (see below), whose sum is σ = 499830912. Its totient is φ = 70081264.

The previous prime is 212228507. The next prime is 212228509. The reversal of 212228508 is 805822212.

212228508 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212228507) and next prime (212228509).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212228507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81360 + ... + 83927.

It is an arithmetic number, because the mean of its divisors is an integer number (20826288).

Almost surely, 2^212228508 is an apocalyptic number.

It is an amenable number.

212228508 is an abundant number, since it is smaller than the sum of its proper divisors (287602404).

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

212228508 is a wasteful number, since it uses less digits than its factorization.

212228508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165401 (or 165399 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 212228508 is about 14568.0646621300. The cubic root of 212228508 is about 596.4873534322.

The spelling of 212228508 in words is "two hundred twelve million, two hundred twenty-eight thousand, five hundred eight".