122154550 has 72 divisors (see below), whose sum is σ = 268315416. Its totient is φ = 41247360.

The previous prime is 122154511. The next prime is 122154563. The reversal of 122154550 is 55451221.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 178509 + ... + 179191.

It is an arithmetic number, because the mean of its divisors is an integer number (3726603).

Almost surely, 2^122154550 is an apocalyptic number.

122154550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122154550 is an abundant number, since it is smaller than the sum of its proper divisors (146160866).

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

122154550 is a wasteful number, since it uses less digits than its factorization.

122154550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 122154550 is about 11052.3549526786. The cubic root of 122154550 is about 496.1769091235.

The spelling of 122154550 in words is "one hundred twenty-two million, one hundred fifty-four thousand, five hundred fifty".