155221150 has 24 divisors (see below), whose sum is σ = 329956560. Its totient is φ = 53218560.

The previous prime is 155221133. The next prime is 155221159. The reversal of 155221150 is 51122551.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155221159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221395 + ... + 222094.

It is an arithmetic number, because the mean of its divisors is an integer number (13748190).

Almost surely, 2^155221150 is an apocalyptic number.

155221150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155221150 is an abundant number, since it is smaller than the sum of its proper divisors (174735410).

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

155221150 is a wasteful number, since it uses less digits than its factorization.

155221150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443508 (or 443503 counting only the distinct ones).

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

The square root of 155221150 is about 12458.7780299675. The cubic root of 155221150 is about 537.4238868247.

The spelling of 155221150 in words is "one hundred fifty-five million, two hundred twenty-one thousand, one hundred fifty".