2131313077 has 2 divisors, whose sum is σ = 2131313078. Its totient is φ = 2131313076.

The previous prime is 2131313071. The next prime is 2131313141. The reversal of 2131313077 is 7703131312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1949575716 + 181737361 = 44154^2 + 13481^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131313077 - 2⁷ = 2131312949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131313071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065656538 + 1065656539.

It is an arithmetic number, because the mean of its divisors is an integer number (1065656539).

Almost surely, 2^2131313077 is an apocalyptic number.

It is an amenable number.

2131313077 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131313077 is an equidigital number, since it uses as much as digits as its factorization.

2131313077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646, while the sum is 28.

The square root of 2131313077 is about 46166.1464387055. The cubic root of 2131313077 is about 1286.9126894566.

Adding to 2131313077 its reverse (7703131312), we get a palindrome (9834444389).

The spelling of 2131313077 in words is "two billion, one hundred thirty-one million, three hundred thirteen thousand, seventy-seven".