145111555 has 4 divisors (see below), whose sum is σ = 174133872. Its totient is φ = 116089240.

The previous prime is 145111553. The next prime is 145111573. The reversal of 145111555 is 555111541.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 145111555 - 2¹ = 145111553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145111553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14511151 + ... + 14511160.

It is an arithmetic number, because the mean of its divisors is an integer number (43533468).

Almost surely, 2^145111555 is an apocalyptic number.

145111555 is a deficient number, since it is larger than the sum of its proper divisors (29022317).

145111555 is an equidigital number, since it uses as much as digits as its factorization.

145111555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29022316.

The product of its digits is 2500, while the sum is 28.

The square root of 145111555 is about 12046.2257574728. The cubic root of 145111555 is about 525.4934800687.

The spelling of 145111555 in words is "one hundred forty-five million, one hundred eleven thousand, five hundred fifty-five".