145135553 has 2 divisors, whose sum is σ = 145135554. Its totient is φ = 145135552.

The previous prime is 145135541. The next prime is 145135603. The reversal of 145135553 is 355531541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142754704 + 2380849 = 11948^2 + 1543^2 .

It is a cyclic number.

It is not a de Polignac number, because 145135553 - 2⁸ = 145135297 is a prime.

It is not a weakly prime, because it can be changed into another prime (145135513) by changing a digit.

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 as a sum of consecutive naturals, namely, 72567776 + 72567777.

It is an arithmetic number, because the mean of its divisors is an integer number (72567777).

Almost surely, 2^145135553 is an apocalyptic number.

It is an amenable number.

145135553 is a deficient number, since it is larger than the sum of its proper divisors (1).

145135553 is an equidigital number, since it uses as much as digits as its factorization.

145135553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22500, while the sum is 32.

The square root of 145135553 is about 12047.2217959163. The cubic root of 145135553 is about 525.5224465132.

It can be divided in two parts, 1451 and 35553, that multiplied together give a triangular number (51587403 = T₁₀₁₅₇).

The spelling of 145135553 in words is "one hundred forty-five million, one hundred thirty-five thousand, five hundred fifty-three".