1445555323 has 4 divisors (see below), whose sum is σ = 1445879448. Its totient is φ = 1445231200.

The previous prime is 1445555297. The next prime is 1445555347. The reversal of 1445555323 is 3235555441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3235555441 = 137 ⋅23617193.

It is a cyclic number.

It is not a de Polignac number, because 1445555323 - 2⁵ = 1445555291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1445555393) 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 3 ways as a sum of consecutive naturals, for example, 155278 + ... + 164323.

It is an arithmetic number, because the mean of its divisors is an integer number (361469862).

Almost surely, 2^1445555323 is an apocalyptic number.

1445555323 is a deficient number, since it is larger than the sum of its proper divisors (324125).

1445555323 is an equidigital number, since it uses as much as digits as its factorization.

1445555323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324124.

The product of its digits is 180000, while the sum is 37.

The square root of 1445555323 is about 38020.4592686622. The cubic root of 1445555323 is about 1130.6935265480.

It can be divided in two parts, 144555 and 5323, that added together give a triangular number (149878 = T₅₄₇).

The spelling of 1445555323 in words is "one billion, four hundred forty-five million, five hundred fifty-five thousand, three hundred twenty-three".