2551203323550 has 216 divisors, whose sum is σ = 8158719779496. Its totient is φ = 569570762880.

The previous prime is 2551203323531. The next prime is 2551203323551. The reversal of 2551203323550 is 553233021552.

2551203323550 is a `hidden beast` number, since 2 + 5 + 51 + 2 + 0 + 33 + 23 + 550 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551203323551) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 397209 + ... + 2293508.

It is an arithmetic number, because the mean of its divisors is an integer number (37771850831).

Almost surely, 2^{2551203323550} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2551203323550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4079359889748).

2551203323550 is an abundant number, since it is smaller than the sum of its proper divisors (5607516455946).

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

2551203323550 is a wasteful number, since it uses less digits than its factorization.

2551203323550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690792 (or 2690777 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 36.

The spelling of 2551203323550 in words is "two trillion, five hundred fifty-one billion, two hundred three million, three hundred twenty-three thousand, five hundred fifty".