145313447 has 4 divisors (see below), whose sum is σ = 146752296. Its totient is φ = 143874600.

The previous prime is 145313437. The next prime is 145313449. The reversal of 145313447 is 744313541.

145313447 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 an emirpimes, since its reverse is a distinct semiprime: 744313541 = 101 ⋅7369441.

It is a cyclic number.

It is not a de Polignac number, because 145313447 - 2⁴ = 145313431 is a prime.

It is a super-2 number, since 2×145313447² = 42231995758043618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145313449) 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, 719273 + ... + 719474.

It is an arithmetic number, because the mean of its divisors is an integer number (36688074).

Almost surely, 2^145313447 is an apocalyptic number.

145313447 is a deficient number, since it is larger than the sum of its proper divisors (1438849).

145313447 is a wasteful number, since it uses less digits than its factorization.

145313447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438848.

The product of its digits is 20160, while the sum is 32.

The square root of 145313447 is about 12054.6027309074. The cubic root of 145313447 is about 525.7370714347.

Adding to 145313447 its reverse (744313541), we get a palindrome (889626988).

The spelling of 145313447 in words is "one hundred forty-five million, three hundred thirteen thousand, four hundred forty-seven".