145223451 has 6 divisors (see below), whose sum is σ = 209767220. Its totient is φ = 96815628.

The previous prime is 145223443. The next prime is 145223461. The reversal of 145223451 is 154322541.

It is not a de Polignac number, because 145223451 - 2³ = 145223443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145223411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8067961 + ... + 8067978.

Almost surely, 2^145223451 is an apocalyptic number.

145223451 is a deficient number, since it is larger than the sum of its proper divisors (64543769).

145223451 is a wasteful number, since it uses less digits than its factorization.

145223451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16135945 (or 16135942 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 145223451 is about 12050.8693047431. The cubic root of 145223451 is about 525.6285152861.

Adding to 145223451 its reverse (154322541), we get a palindrome (299545992).

The spelling of 145223451 in words is "one hundred forty-five million, two hundred twenty-three thousand, four hundred fifty-one".