211225172650 has 96 divisors (see below), whose sum is σ = 425097792000. Its totient is φ = 77813187840.

The previous prime is 211225172633. The next prime is 211225172651. The reversal of 211225172650 is 56271522112.

It is a super-2 number, since 2×211225172650² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211225172651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62881671 + ... + 62885029.

It is an arithmetic number, because the mean of its divisors is an integer number (4428102000).

Almost surely, 2^211225172650 is an apocalyptic number.

211225172650 is an abundant number, since it is smaller than the sum of its proper divisors (213872619350).

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

211225172650 is a wasteful number, since it uses less digits than its factorization.

211225172650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5216 (or 5211 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

Adding to 211225172650 its reverse (56271522112), we get a palindrome (267496694762).

The spelling of 211225172650 in words is "two hundred eleven billion, two hundred twenty-five million, one hundred seventy-two thousand, six hundred fifty".