2131732321 has 2 divisors, whose sum is σ = 2131732322. Its totient is φ = 2131732320.

The previous prime is 2131732313. The next prime is 2131732373. The reversal of 2131732321 is 1232371312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1760977296 + 370755025 = 41964^2 + 19255^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131732321 - 2³ = 2131732313 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131732021) 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 as a sum of consecutive naturals, namely, 1065866160 + 1065866161.

It is an arithmetic number, because the mean of its divisors is an integer number (1065866161).

Almost surely, 2^2131732321 is an apocalyptic number.

It is an amenable number.

2131732321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131732321 is an equidigital number, since it uses as much as digits as its factorization.

2131732321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 2131732321 is about 46170.6868153377. The cubic root of 2131732321 is about 1286.9970654620.

The spelling of 2131732321 in words is "two billion, one hundred thirty-one million, seven hundred thirty-two thousand, three hundred twenty-one".