145220855 has 24 divisors (see below), whose sum is σ = 190920240. Its totient is φ = 105980160.

The previous prime is 145220849. The next prime is 145220879. The reversal of 145220855 is 558022541.

It is not a de Polignac number, because 145220855 - 2¹⁶ = 145155319 is a prime.

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, 74240 + ... + 76170.

It is an arithmetic number, because the mean of its divisors is an integer number (7955010).

Almost surely, 2^145220855 is an apocalyptic number.

145220855 is a deficient number, since it is larger than the sum of its proper divisors (45699385).

145220855 is a wasteful number, since it uses less digits than its factorization.

145220855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2051 (or 2038 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 145220855 is about 12050.7615941898. The cubic root of 145220855 is about 525.6253832397.

The spelling of 145220855 in words is "one hundred forty-five million, two hundred twenty thousand, eight hundred fifty-five".