122155566 has 48 divisors (see below), whose sum is σ = 269660016. Its totient is φ = 36860928.

The previous prime is 122155549. The next prime is 122155573. The reversal of 122155566 is 665551221.

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, 52606 + ... + 54878.

It is an arithmetic number, because the mean of its divisors is an integer number (5617917).

Almost surely, 2^122155566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122155566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134830008).

122155566 is an abundant number, since it is smaller than the sum of its proper divisors (147504450).

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

122155566 is a wasteful number, since it uses less digits than its factorization.

122155566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357 (or 2344 counting only the distinct ones).

The product of its digits is 18000, while the sum is 33.

The square root of 122155566 is about 11052.4009156382. The cubic root of 122155566 is about 496.1782847424.

The spelling of 122155566 in words is "one hundred twenty-two million, one hundred fifty-five thousand, five hundred sixty-six".