1423552321 has 4 divisors (see below), whose sum is σ = 1423833732. Its totient is φ = 1423270912.

The previous prime is 1423552313. The next prime is 1423552331. The reversal of 1423552321 is 1232553241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1232553241 = 1549 ⋅795709.

It can be written as a sum of positive squares in 2 ways, for example, as 1203326721 + 220225600 = 34689^2 + 14840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423552321 - 2³ = 1423552313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1423552321.

It is not an unprimeable number, because it can be changed into a prime (1423552331) 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, 132976 + ... + 143281.

It is an arithmetic number, because the mean of its divisors is an integer number (355958433).

Almost surely, 2^1423552321 is an apocalyptic number.

It is an amenable number.

1423552321 is a deficient number, since it is larger than the sum of its proper divisors (281411).

1423552321 is an equidigital number, since it uses as much as digits as its factorization.

1423552321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281410.

The product of its digits is 7200, while the sum is 28.

The square root of 1423552321 is about 37729.9923270599. The cubic root of 1423552321 is about 1124.9273555726.

The spelling of 1423552321 in words is "one billion, four hundred twenty-three million, five hundred fifty-two thousand, three hundred twenty-one".