213225145656 has 64 divisors (see below), whose sum is σ = 541047168000. Its totient is φ = 70017552000.

The previous prime is 213225145643. The next prime is 213225145663. The reversal of 213225145656 is 656541522312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261361 + ... + 703391.

It is an arithmetic number, because the mean of its divisors is an integer number (8453862000).

Almost surely, 2^213225145656 is an apocalyptic number.

It is an amenable number.

213225145656 is an abundant number, since it is smaller than the sum of its proper divisors (327822022344).

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

213225145656 is a wasteful number, since it uses less digits than its factorization.

213225145656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442340 (or 442336 counting only the distinct ones).

The product of its digits is 432000, while the sum is 42.

Adding to 213225145656 its reverse (656541522312), we get a palindrome (869766667968).

The spelling of 213225145656 in words is "two hundred thirteen billion, two hundred twenty-five million, one hundred forty-five thousand, six hundred fifty-six".