211212530 has 8 divisors (see below), whose sum is σ = 380182572. Its totient is φ = 84485008.

The previous prime is 211212499. The next prime is 211212541. The reversal of 211212530 is 35212112.

It is a happy number.

211212530 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 208426969 + 2785561 = 14437^2 + 1669^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×211212530² = 89221465658001800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211212499 and 211212508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10560617 + ... + 10560636.

Almost surely, 2^211212530 is an apocalyptic number.

211212530 is a deficient number, since it is larger than the sum of its proper divisors (168970042).

211212530 is a wasteful number, since it uses less digits than its factorization.

211212530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21121260.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 211212530 is about 14533.1527893985. The cubic root of 211212530 is about 595.5339979269.

Adding to 211212530 its reverse (35212112), we get a palindrome (246424642).

The spelling of 211212530 in words is "two hundred eleven million, two hundred twelve thousand, five hundred thirty".