145216555 has 32 divisors (see below), whose sum is σ = 200060928. Its totient is φ = 100214400.

The previous prime is 145216541. The next prime is 145216559. The reversal of 145216555 is 555612541.

145216555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145216555 - 2¹¹ = 145214507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145216555.

It is not an unprimeable number, because it can be changed into a prime (145216559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89562 + ... + 91168.

It is an arithmetic number, because the mean of its divisors is an integer number (6251904).

Almost surely, 2^145216555 is an apocalyptic number.

145216555 is a deficient number, since it is larger than the sum of its proper divisors (54844373).

145216555 is a wasteful number, since it uses less digits than its factorization.

145216555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707.

The product of its digits is 30000, while the sum is 34.

The square root of 145216555 is about 12050.5831809087. The cubic root of 145216555 is about 525.6201952533.

The spelling of 145216555 in words is "one hundred forty-five million, two hundred sixteen thousand, five hundred fifty-five".