2131245445550 has 192 divisors, whose sum is σ = 4595285882880. Its totient is φ = 728397895680.

The previous prime is 2131245445541. The next prime is 2131245445561. The reversal of 2131245445550 is 555445421312.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2131245445498 and 2131245445507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 229581209 + ... + 229590491.

It is an arithmetic number, because the mean of its divisors is an integer number (23933780640).

Almost surely, 2^{2131245445550} is an apocalyptic number.

2131245445550 is an abundant number, since it is smaller than the sum of its proper divisors (2464040437330).

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

2131245445550 is a wasteful number, since it uses less digits than its factorization.

2131245445550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9667 (or 9662 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 41.

The spelling of 2131245445550 in words is "two trillion, one hundred thirty-one billion, two hundred forty-five million, four hundred forty-five thousand, five hundred fifty".