212275380 has 48 divisors (see below), whose sum is σ = 597421440. Its totient is φ = 56316288.

The previous prime is 212275361. The next prime is 212275397. The reversal of 212275380 is 83572212.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2841 + ... + 20799.

It is an arithmetic number, because the mean of its divisors is an integer number (12446280).

Almost surely, 2^212275380 is an apocalyptic number.

212275380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212275380 is an abundant number, since it is smaller than the sum of its proper divisors (385146060).

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

212275380 is a wasteful number, since it uses less digits than its factorization.

212275380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18168 (or 18166 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 212275380 is about 14569.6732976412. The cubic root of 212275380 is about 596.5312628603.

The spelling of 212275380 in words is "two hundred twelve million, two hundred seventy-five thousand, three hundred eighty".