145553169 has 4 divisors (see below), whose sum is σ = 194070896. Its totient is φ = 97035444.

The previous prime is 145553123. The next prime is 145553171. The reversal of 145553169 is 961355541.

It is a happy number.

145553169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 145553169 - 2¹¹ = 145551121 is a prime.

It is a super-2 number, since 2×145553169² = 42371450011885122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145553189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24258859 + ... + 24258864.

It is an arithmetic number, because the mean of its divisors is an integer number (48517724).

Almost surely, 2^145553169 is an apocalyptic number.

It is an amenable number.

145553169 is a deficient number, since it is larger than the sum of its proper divisors (48517727).

145553169 is an equidigital number, since it uses as much as digits as its factorization.

145553169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48517726.

The product of its digits is 81000, while the sum is 39.

The square root of 145553169 is about 12064.5418064674. The cubic root of 145553169 is about 526.0260134985.

The spelling of 145553169 in words is "one hundred forty-five million, five hundred fifty-three thousand, one hundred sixty-nine".