1431431231 has 16 divisors (see below), whose sum is σ = 1513521408. Its totient is φ = 1351987200.

The previous prime is 1431431207. The next prime is 1431431249. The reversal of 1431431231 is 1321341341.

It is a cyclic number.

It is not a de Polignac number, because 1431431231 - 2⁶ = 1431431167 is a prime.

It is a super-2 number, since 2×1431431231² = 4097990738164350722, 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 = 1431431197 and 1431431206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431431251) 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 15 ways as a sum of consecutive naturals, for example, 216251 + ... + 222771.

It is an arithmetic number, because the mean of its divisors is an integer number (94595088).

Almost surely, 2^1431431231 is an apocalyptic number.

1431431231 is a deficient number, since it is larger than the sum of its proper divisors (82090177).

1431431231 is an equidigital number, since it uses as much as digits as its factorization.

1431431231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6722.

The product of its digits is 864, while the sum is 23.

The square root of 1431431231 is about 37834.2600165511. The cubic root of 1431431231 is about 1126.9989103458.

Adding to 1431431231 its reverse (1321341341), we get a palindrome (2752772572).

The spelling of 1431431231 in words is "one billion, four hundred thirty-one million, four hundred thirty-one thousand, two hundred thirty-one".