1431133421 has 2 divisors, whose sum is σ = 1431133422. Its totient is φ = 1431133420.

The previous prime is 1431133411. The next prime is 1431133469. The reversal of 1431133421 is 1243311341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 955675396 + 475458025 = 30914^2 + 21805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1431133421 - 2⁶ = 1431133357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1431133411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715566710 + 715566711.

It is an arithmetic number, because the mean of its divisors is an integer number (715566711).

Almost surely, 2^1431133421 is an apocalyptic number.

It is an amenable number.

1431133421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431133421 is an equidigital number, since it uses as much as digits as its factorization.

1431133421 is an evil number, because the sum of its binary digits is even.

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

The square root of 1431133421 is about 37830.3240932456. The cubic root of 1431133421 is about 1126.9207473583.

Adding to 1431133421 its reverse (1243311341), we get a palindrome (2674444762).

The spelling of 1431133421 in words is "one billion, four hundred thirty-one million, one hundred thirty-three thousand, four hundred twenty-one".