2031131077 has 2 divisors, whose sum is σ = 2031131078. Its totient is φ = 2031131076.

The previous prime is 2031131071. The next prime is 2031131143. The reversal of 2031131077 is 7701311302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1791067041 + 240064036 = 42321^2 + 15494^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031131077 - 2⁷ = 2031130949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2031131071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015565538 + 1015565539.

It is an arithmetic number, because the mean of its divisors is an integer number (1015565539).

Almost surely, 2^2031131077 is an apocalyptic number.

It is an amenable number.

2031131077 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031131077 is an equidigital number, since it uses as much as digits as its factorization.

2031131077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 2031131077 is about 45068.0715917599. The cubic root of 2031131077 is about 1266.4245388148.

Adding to 2031131077 its reverse (7701311302), we get a palindrome (9732442379).

The spelling of 2031131077 in words is "two billion, thirty-one million, one hundred thirty-one thousand, seventy-seven".