2131553202444 has 144 divisors (see below), whose sum is σ = 5845071232000. Its totient is φ = 653455071360.

The previous prime is 2131553202431. The next prime is 2131553202497. The reversal of 2131553202444 is 4442023551312.

It is a happy number.

2131553202444 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 5 + 5 + 3 + 202 + 444 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 2131553202399 and 2131553202408.

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, 1175307 + ... + 2375805.

Almost surely, 2^{2131553202444} 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 2131553202444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2922535616000).

2131553202444 is an abundant number, since it is smaller than the sum of its proper divisors (3713518029556).

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

2131553202444 is a wasteful number, since it uses less digits than its factorization.

2131553202444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200620 (or 1200615 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 2131553202444 its reverse (4442023551312), we get a palindrome (6573576753756).

The spelling of 2131553202444 in words is "two trillion, one hundred thirty-one billion, five hundred fifty-three million, two hundred two thousand, four hundred forty-four".