131015761 has 2 divisors, whose sum is σ = 131015762. Its totient is φ = 131015760.

The previous prime is 131015747. The next prime is 131015767. The reversal of 131015761 is 167510131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130965136 + 50625 = 11444^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 131015761 - 2²¹ = 128918609 is a prime.

It is not a weakly prime, because it can be changed into another prime (131015767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65507880 + 65507881.

It is an arithmetic number, because the mean of its divisors is an integer number (65507881).

Almost surely, 2^131015761 is an apocalyptic number.

It is an amenable number.

131015761 is a deficient number, since it is larger than the sum of its proper divisors (1).

131015761 is an equidigital number, since it uses as much as digits as its factorization.

131015761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 131015761 is about 11446.2116440331. The cubic root of 131015761 is about 507.8956749932.

Adding to 131015761 its reverse (167510131), we get a palindrome (298525892).

It can be divided in two parts, 1310 and 15761, that added together give a palindrome (17071).

The spelling of 131015761 in words is "one hundred thirty-one million, fifteen thousand, seven hundred sixty-one".