55251122542550 has 48 divisors (see below), whose sum is σ = 112535822817792. Its totient is φ = 20014924394400.

The previous prime is 55251122542523. The next prime is 55251122542571. The reversal of 55251122542550 is 5524522115255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190837454 + ... + 191126753.

It is an arithmetic number, because the mean of its divisors is an integer number (2344496308704).

Almost surely, 2^{55251122542550} is an apocalyptic number.

55251122542550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55251122542550 is an abundant number, since it is smaller than the sum of its proper divisors (57284700275242).

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

55251122542550 is a wasteful number, since it uses less digits than its factorization.

55251122542550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381964493 (or 381964488 counting only the distinct ones).

The product of its (nonzero) digits is 1000000, while the sum is 44.

The spelling of 55251122542550 in words is "fifty-five trillion, two hundred fifty-one billion, one hundred twenty-two million, five hundred forty-two thousand, five hundred fifty".