145203555 has 16 divisors (see below), whose sum is σ = 265515264. Its totient is φ = 66378720.

The previous prime is 145203533. The next prime is 145203599. The reversal of 145203555 is 555302541.

It is a happy number.

It is not a de Polignac number, because 145203555 - 2⁵ = 145203523 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 691341 + ... + 691550.

It is an arithmetic number, because the mean of its divisors is an integer number (16594704).

Almost surely, 2^145203555 is an apocalyptic number.

145203555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145203555 is a deficient number, since it is larger than the sum of its proper divisors (120311709).

145203555 is a wasteful number, since it uses less digits than its factorization.

145203555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382906.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 145203555 is about 12050.0437758541. The cubic root of 145203555 is about 525.6045100204.

The spelling of 145203555 in words is "one hundred forty-five million, two hundred three thousand, five hundred fifty-five".