122151550 has 12 divisors (see below), whose sum is σ = 227201976. Its totient is φ = 48860600.

The previous prime is 122151517. The next prime is 122151553. The reversal of 122151550 is 55151221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122151553) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1221466 + ... + 1221565.

It is an arithmetic number, because the mean of its divisors is an integer number (18933498).

Almost surely, 2^122151550 is an apocalyptic number.

122151550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122151550 is a deficient number, since it is larger than the sum of its proper divisors (105050426).

122151550 is a wasteful number, since it uses less digits than its factorization.

122151550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443043 (or 2443038 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 122151550 is about 11052.2192341629. The cubic root of 122151550 is about 496.1728472120.

The spelling of 122151550 in words is "one hundred twenty-two million, one hundred fifty-one thousand, five hundred fifty".