215332132321 has 2 divisors, whose sum is σ = 215332132322. Its totient is φ = 215332132320.

The previous prime is 215332132303. The next prime is 215332132343. The reversal of 215332132321 is 123231233512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199433696400 + 15898435921 = 446580^2 + 126089^2 .

It is a cyclic number.

It is not a de Polignac number, because 215332132321 - 2¹⁵ = 215332099553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215332132321.

It is not a weakly prime, because it can be changed into another prime (215332132021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107666066160 + 107666066161.

It is an arithmetic number, because the mean of its divisors is an integer number (107666066161).

Almost surely, 2^215332132321 is an apocalyptic number.

It is an amenable number.

215332132321 is a deficient number, since it is larger than the sum of its proper divisors (1).

215332132321 is an equidigital number, since it uses as much as digits as its factorization.

215332132321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 28.

Adding to 215332132321 its reverse (123231233512), we get a palindrome (338563365833).

The spelling of 215332132321 in words is "two hundred fifteen billion, three hundred thirty-two million, one hundred thirty-two thousand, three hundred twenty-one".