145585553 has 2 divisors, whose sum is σ = 145585554. Its totient is φ = 145585552.

The previous prime is 145585537. The next prime is 145585613. The reversal of 145585553 is 355585541.

145585553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136142224 + 9443329 = 11668^2 + 3073^2 .

It is a cyclic number.

It is not a de Polignac number, because 145585553 - 2⁴ = 145585537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145585553.

It is not a weakly prime, because it can be changed into another prime (145585513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72792776 + 72792777.

It is an arithmetic number, because the mean of its divisors is an integer number (72792777).

Almost surely, 2^145585553 is an apocalyptic number.

It is an amenable number.

145585553 is a deficient number, since it is larger than the sum of its proper divisors (1).

145585553 is an equidigital number, since it uses as much as digits as its factorization.

145585553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 300000, while the sum is 41.

The square root of 145585553 is about 12065.8838466148. The cubic root of 145585553 is about 526.0650222982.

The spelling of 145585553 in words is "one hundred forty-five million, five hundred eighty-five thousand, five hundred fifty-three".