122555550 has 96 divisors (see below), whose sum is σ = 346665312. Its totient is φ = 28385280.

The previous prime is 122555513. The next prime is 122555591. The reversal of 122555550 is 55555221.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

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, 31302 + ... + 34998.

It is an arithmetic number, because the mean of its divisors is an integer number (3611097).

Almost surely, 2^122555550 is an apocalyptic number.

122555550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 122555550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173332656).

122555550 is an abundant number, since it is smaller than the sum of its proper divisors (224109762).

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

122555550 is a wasteful number, since it uses less digits than its factorization.

122555550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3742 (or 3737 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 122555550 is about 11070.4810193595. The cubic root of 122555550 is about 496.7192538246.

The spelling of 122555550 in words is "one hundred twenty-two million, five hundred fifty-five thousand, five hundred fifty".