212522645 has 8 divisors (see below), whose sum is σ = 266115456. Its totient is φ = 162625936.

The previous prime is 212522623. The next prime is 212522659. The reversal of 212522645 is 546225212.

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

It is a cyclic number.

It is not a de Polignac number, because 212522645 - 2²⁶ = 145413781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 923897 + ... + 924126.

It is an arithmetic number, because the mean of its divisors is an integer number (33264432).

Almost surely, 2^212522645 is an apocalyptic number.

It is an amenable number.

212522645 is a deficient number, since it is larger than the sum of its proper divisors (53592811).

212522645 is a wasteful number, since it uses less digits than its factorization.

212522645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848051.

The product of its digits is 9600, while the sum is 29.

The square root of 212522645 is about 14578.1564335138. The cubic root of 212522645 is about 596.7627924083.

Adding to 212522645 its reverse (546225212), we get a palindrome (758747857).

The spelling of 212522645 in words is "two hundred twelve million, five hundred twenty-two thousand, six hundred forty-five".