1431132421 has 4 divisors (see below), whose sum is σ = 1506455200. Its totient is φ = 1355809644.

The previous prime is 1431132419. The next prime is 1431132449. The reversal of 1431132421 is 1242311341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1431132421 - 2¹ = 1431132419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1431132392 and 1431132401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431132491) 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, 37661361 + ... + 37661398.

It is an arithmetic number, because the mean of its divisors is an integer number (376613800).

Almost surely, 2^1431132421 is an apocalyptic number.

It is an amenable number.

1431132421 is a deficient number, since it is larger than the sum of its proper divisors (75322779).

1431132421 is an equidigital number, since it uses as much as digits as its factorization.

1431132421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75322778.

The product of its digits is 576, while the sum is 22.

The square root of 1431132421 is about 37830.3108763330. The cubic root of 1431132421 is about 1126.9204848808.

Adding to 1431132421 its reverse (1242311341), we get a palindrome (2673443762).

The spelling of 1431132421 in words is "one billion, four hundred thirty-one million, one hundred thirty-two thousand, four hundred twenty-one".