1431443421 has 20 divisors (see below), whose sum is σ = 2183831232. Its totient is φ = 933988968.

The previous prime is 1431443411. The next prime is 1431443443. The reversal of 1431443421 is 1243441341.

1431443421 is a `hidden beast` number, since 1 + 4 + 314 + 4 + 342 + 1 = 666.

It is not a de Polignac number, because 1431443421 - 2⁵ = 1431443389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431443411) 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 19 ways as a sum of consecutive naturals, for example, 184195 + ... + 191808.

Almost surely, 2^1431443421 is an apocalyptic number.

It is an amenable number.

1431443421 is a deficient number, since it is larger than the sum of its proper divisors (752387811).

1431443421 is an equidigital number, since it uses as much as digits as its factorization.

1431443421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376062 (or 376053 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 1431443421 is about 37834.4211135839. The cubic root of 1431443421 is about 1127.0021094931.

Adding to 1431443421 its reverse (1243441341), we get a palindrome (2674884762).

The spelling of 1431443421 in words is "one billion, four hundred thirty-one million, four hundred forty-three thousand, four hundred twenty-one".