1431231231 has 4 divisors (see below), whose sum is σ = 1908308312. Its totient is φ = 954154152.

The previous prime is 1431231209. The next prime is 1431231233. The reversal of 1431231231 is 1321321341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1321321341 = 3 ⋅440440447.

It is not a de Polignac number, because 1431231231 - 2¹¹ = 1431229183 is a prime.

It is a super-2 number, since 2×1431231231² = 4096845673179550722, 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 = 1431231198 and 1431231207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431231233) 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, 238538536 + ... + 238538541.

It is an arithmetic number, because the mean of its divisors is an integer number (477077078).

Almost surely, 2^1431231231 is an apocalyptic number.

1431231231 is a deficient number, since it is larger than the sum of its proper divisors (477077081).

1431231231 is an equidigital number, since it uses as much as digits as its factorization.

1431231231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477077080.

The product of its digits is 432, while the sum is 21.

The square root of 1431231231 is about 37831.6168171544. The cubic root of 1431231231 is about 1126.9464196928.

Adding to 1431231231 its reverse (1321321341), we get a palindrome (2752552572).

The spelling of 1431231231 in words is "one billion, four hundred thirty-one million, two hundred thirty-one thousand, two hundred thirty-one".