1331421433 has 4 divisors (see below), whose sum is σ = 1332855540. Its totient is φ = 1329987328.

The previous prime is 1331421379. The next prime is 1331421461. The reversal of 1331421433 is 3341241331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 540237049 + 791184384 = 23243^2 + 28128^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331421433 - 2¹³ = 1331413241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331421398 and 1331421407.

It is not an unprimeable number, because it can be changed into a prime (1331421473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715660 + ... + 717517.

It is an arithmetic number, because the mean of its divisors is an integer number (333213885).

Almost surely, 2^1331421433 is an apocalyptic number.

It is an amenable number.

1331421433 is a deficient number, since it is larger than the sum of its proper divisors (1434107).

1331421433 is an equidigital number, since it uses as much as digits as its factorization.

1331421433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434106.

The product of its digits is 2592, while the sum is 25.

The square root of 1331421433 is about 36488.6480018101. The cubic root of 1331421433 is about 1100.1160849941.

Adding to 1331421433 its reverse (3341241331), we get a palindrome (4672662764).

The spelling of 1331421433 in words is "one billion, three hundred thirty-one million, four hundred twenty-one thousand, four hundred thirty-three".