145550305 has 8 divisors (see below), whose sum is σ = 178376832. Its totient is φ = 113962608.

The previous prime is 145550303. The next prime is 145550323. The reversal of 145550305 is 503055541.

145550305 = T₂₅₇ + T₂₅₈ + ... + T₉₆₁.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145550305 - 2¹ = 145550303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145550303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309447 + ... + 309916.

It is an arithmetic number, because the mean of its divisors is an integer number (22297104).

Almost surely, 2^145550305 is an apocalyptic number.

It is an amenable number.

145550305 is a deficient number, since it is larger than the sum of its proper divisors (32826527).

145550305 is an equidigital number, since it uses as much as digits as its factorization.

145550305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619415.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 145550305 is about 12064.4231109490. The cubic root of 145550305 is about 526.0225633311.

The spelling of 145550305 in words is "one hundred forty-five million, five hundred fifty thousand, three hundred five".