145226550 has 48 divisors (see below), whose sum is σ = 411616512. Its totient is φ = 33194400.

The previous prime is 145226539. The next prime is 145226579. The reversal of 145226550 is 55622541.

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

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 23 ways as a sum of consecutive naturals, for example, 68106 + ... + 70205.

It is an arithmetic number, because the mean of its divisors is an integer number (8575344).

Almost surely, 2^145226550 is an apocalyptic number.

145226550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145226550 is an abundant number, since it is smaller than the sum of its proper divisors (266389962).

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

145226550 is a wasteful number, since it uses less digits than its factorization.

145226550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138333 (or 138328 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 145226550 is about 12050.9978839928. The cubic root of 145226550 is about 525.6322541477.

The spelling of 145226550 in words is "one hundred forty-five million, two hundred twenty-six thousand, five hundred fifty".