5511731321 has 2 divisors, whose sum is σ = 5511731322. Its totient is φ = 5511731320.

The previous prime is 5511731317. The next prime is 5511731327. The reversal of 5511731321 is 1231371155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4184149225 + 1327582096 = 64685^2 + 36436^2 .

It is a cyclic number.

It is not a de Polignac number, because 5511731321 - 2² = 5511731317 is a prime.

It is not a weakly prime, because it can be changed into another prime (5511731327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2755865660 + 2755865661.

It is an arithmetic number, because the mean of its divisors is an integer number (2755865661).

Almost surely, 2^5511731321 is an apocalyptic number.

It is an amenable number.

5511731321 is a deficient number, since it is larger than the sum of its proper divisors (1).

5511731321 is an equidigital number, since it uses as much as digits as its factorization.

5511731321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 29.

The square root of 5511731321 is about 74241.0352904645. The cubic root of 5511731321 is about 1766.4282960973.

The spelling of 5511731321 in words is "five billion, five hundred eleven million, seven hundred thirty-one thousand, three hundred twenty-one".