2756131321 has 4 divisors (see below), whose sum is σ = 2794950144. Its totient is φ = 2717312500.

The previous prime is 2756131271. The next prime is 2756131333. The reversal of 2756131321 is 1231316572.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2756131321 - 2³¹ = 608647673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2756131351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19409305 + ... + 19409446.

It is an arithmetic number, because the mean of its divisors is an integer number (698737536).

Almost surely, 2^2756131321 is an apocalyptic number.

It is an amenable number.

2756131321 is a deficient number, since it is larger than the sum of its proper divisors (38818823).

2756131321 is an equidigital number, since it uses as much as digits as its factorization.

2756131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38818822.

The product of its digits is 7560, while the sum is 31.

The square root of 2756131321 is about 52498.8697116424. The cubic root of 2756131321 is about 1402.0601168562.

Adding to 2756131321 its reverse (1231316572), we get a palindrome (3987447893).

The spelling of 2756131321 in words is "two billion, seven hundred fifty-six million, one hundred thirty-one thousand, three hundred twenty-one".