2231354216520 has 768 divisors, whose sum is σ = 8980442714880. Its totient is φ = 491119718400.

The previous prime is 2231354216501. The next prime is 2231354216543. The reversal of 2231354216520 is 256124531322.

2231354216520 is a `hidden beast` number, since 2 + 2 + 31 + 3 + 542 + 1 + 65 + 20 = 666.

It is a super-3 number, since 3×2231354216520³ (a number of 38 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 84774402 + ... + 84800718.

It is an arithmetic number, because the mean of its divisors is an integer number (11693284785).

Almost surely, 2^{2231354216520} is an apocalyptic number.

2231354216520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2231354216520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4490221357440).

2231354216520 is an abundant number, since it is smaller than the sum of its proper divisors (6749088498360).

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

2231354216520 is a wasteful number, since it uses less digits than its factorization.

2231354216520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26428 (or 26412 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 2231354216520 its reverse (256124531322), we get a palindrome (2487478747842).

The spelling of 2231354216520 in words is "two trillion, two hundred thirty-one billion, three hundred fifty-four million, two hundred sixteen thousand, five hundred twenty".