212407530 has 64 divisors (see below), whose sum is σ = 544389120. Its totient is φ = 52911936.

The previous prime is 212407463. The next prime is 212407543. The reversal of 212407530 is 35704212.

It is a super-3 number, since 3×212407530³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212407530.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26091 + ... + 33249.

It is an arithmetic number, because the mean of its divisors is an integer number (8506080).

Almost surely, 2^212407530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212407530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272194560).

212407530 is an abundant number, since it is smaller than the sum of its proper divisors (331981590).

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

212407530 is a wasteful number, since it uses less digits than its factorization.

212407530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7235.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 212407530 is about 14574.2076971614. The cubic root of 212407530 is about 596.6550254518.

The spelling of 212407530 in words is "two hundred twelve million, four hundred seven thousand, five hundred thirty".