145231347 has 16 divisors (see below), whose sum is σ = 195615488. Its totient is φ = 95839200.

The previous prime is 145231321. The next prime is 145231349. The reversal of 145231347 is 743132541.

It is a happy number.

It is not a de Polignac number, because 145231347 - 2⁶ = 145231283 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145231349) 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 in 15 ways as a sum of consecutive naturals, for example, 236613 + ... + 237225.

It is an arithmetic number, because the mean of its divisors is an integer number (12225968).

Almost surely, 2^145231347 is an apocalyptic number.

145231347 is a deficient number, since it is larger than the sum of its proper divisors (50384141).

145231347 is a wasteful number, since it uses less digits than its factorization.

145231347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290.

The product of its digits is 10080, while the sum is 30.

The square root of 145231347 is about 12051.1969115105. The cubic root of 145231347 is about 525.6380414967.

Adding to 145231347 its reverse (743132541), we get a palindrome (888363888).

The spelling of 145231347 in words is "one hundred forty-five million, two hundred thirty-one thousand, three hundred forty-seven".