221312342250 has 96 divisors (see below), whose sum is σ = 624447353088. Its totient is φ = 56450671200.

The previous prime is 221312342219. The next prime is 221312342261. The reversal of 221312342250 is 52243213122.

221312342250 is a `hidden beast` number, since 2 + 2 + 1 + 312 + 342 + 2 + 5 + 0 = 666.

It is a super-2 number, since 2×221312342250² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2086534 + ... + 2190033.

It is an arithmetic number, because the mean of its divisors is an integer number (6504659928).

Almost surely, 2^221312342250 is an apocalyptic number.

221312342250 is an abundant number, since it is smaller than the sum of its proper divisors (403135010838).

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

221312342250 is a wasteful number, since it uses less digits than its factorization.

221312342250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4276613 (or 4276600 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 221312342250 its reverse (52243213122), we get a palindrome (273555555372).

The spelling of 221312342250 in words is "two hundred twenty-one billion, three hundred twelve million, three hundred forty-two thousand, two hundred fifty".