1535132321 has 2 divisors, whose sum is σ = 1535132322. Its totient is φ = 1535132320.

The previous prime is 1535132311. The next prime is 1535132323. The reversal of 1535132321 is 1232315351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1527949921 + 7182400 = 39089^2 + 2680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1535132321 is a prime.

Together with 1535132323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1535132323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 767566160 + 767566161.

It is an arithmetic number, because the mean of its divisors is an integer number (767566161).

Almost surely, 2^1535132321 is an apocalyptic number.

It is an amenable number.

1535132321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1535132321 is an equidigital number, since it uses as much as digits as its factorization.

1535132321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 26.

The square root of 1535132321 is about 39180.7646811545. The cubic root of 1535132321 is about 1153.5823567013.

Adding to 1535132321 its reverse (1232315351), we get a palindrome (2767447672).

The spelling of 1535132321 in words is "one billion, five hundred thirty-five million, one hundred thirty-two thousand, three hundred twenty-one".