1423355231 has 4 divisors (see below), whose sum is σ = 1423712712. Its totient is φ = 1422997752.

The previous prime is 1423355203. The next prime is 1423355233. The reversal of 1423355231 is 1325533241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1325533241 = 911 ⋅1455031.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1423355231 is a prime.

It is a super-2 number, since 2×1423355231² = 4051880227230126722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1423355194 and 1423355203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423355233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172700 + ... + 180753.

It is an arithmetic number, because the mean of its divisors is an integer number (355928178).

Almost surely, 2^1423355231 is an apocalyptic number.

1423355231 is a deficient number, since it is larger than the sum of its proper divisors (357481).

1423355231 is an equidigital number, since it uses as much as digits as its factorization.

1423355231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357480.

The product of its digits is 10800, while the sum is 29.

The square root of 1423355231 is about 37727.3803887840. The cubic root of 1423355231 is about 1124.8754379948.

Adding to 1423355231 its reverse (1325533241), we get a palindrome (2748888472).

The spelling of 1423355231 in words is "one billion, four hundred twenty-three million, three hundred fifty-five thousand, two hundred thirty-one".