2031552216684 has 144 divisors (see below), whose sum is σ = 5450984098560. Its totient is φ = 661238303040.

The previous prime is 2031552216667. The next prime is 2031552216737. The reversal of 2031552216684 is 4866122551302.

2031552216684 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 552 + 2 + 16 + 6 + 84 = 666.

It is a super-2 number, since 2×2031552216684² (a number of 25 digits) contains 22 as substring.

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, 219884137 + ... + 219893375.

It is an arithmetic number, because the mean of its divisors is an integer number (37854056240).

Almost surely, 2^{2031552216684} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2031552216684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2725492049280).

2031552216684 is an abundant number, since it is smaller than the sum of its proper divisors (3419431881876).

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

2031552216684 is a wasteful number, since it uses less digits than its factorization.

2031552216684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14562 (or 14548 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

Adding to 2031552216684 its reverse (4866122551302), we get a palindrome (6897674767986).

The spelling of 2031552216684 in words is "two trillion, thirty-one billion, five hundred fifty-two million, two hundred sixteen thousand, six hundred eighty-four".