1231353223 has 4 divisors (see below), whose sum is σ = 1246188888. Its totient is φ = 1216517560.

The previous prime is 1231353217. The next prime is 1231353239. The reversal of 1231353223 is 3223531321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3223531321 = 431 ⋅7479191.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231353223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231353023) 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, 7417708 + ... + 7417873.

It is an arithmetic number, because the mean of its divisors is an integer number (311547222).

Almost surely, 2^1231353223 is an apocalyptic number.

1231353223 is a deficient number, since it is larger than the sum of its proper divisors (14835665).

1231353223 is an equidigital number, since it uses as much as digits as its factorization.

1231353223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14835664.

The product of its digits is 3240, while the sum is 25.

The square root of 1231353223 is about 35090.6429550671. The cubic root of 1231353223 is about 1071.8340522319.

Adding to 1231353223 its reverse (3223531321), we get a palindrome (4454884544).

It can be divided in two parts, 12313 and 53223, that added together give a 16-th power (65536 = 2¹⁶).

The spelling of 1231353223 in words is "one billion, two hundred thirty-one million, three hundred fifty-three thousand, two hundred twenty-three".