2231511535117 has 2 divisors, whose sum is σ = 2231511535118. Its totient is φ = 2231511535116.

The previous prime is 2231511535087. The next prime is 2231511535147. The reversal of 2231511535117 is 7115351151322.

It is a balanced prime because it is at equal distance from previous prime (2231511535087) and next prime (2231511535147).

It can be written as a sum of positive squares in only one way, i.e., 1166186169801 + 1065325365316 = 1079901^2 + 1032146^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2231511535117 is a prime.

It is a super-3 number, since 3×2231511535117³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2231511535147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115755767558 + 1115755767559.

It is an arithmetic number, because the mean of its divisors is an integer number (1115755767559).

Almost surely, 2^{2231511535117} is an apocalyptic number.

It is an amenable number.

2231511535117 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231511535117 is an equidigital number, since it uses as much as digits as its factorization.

2231511535117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31500, while the sum is 37.

Adding to 2231511535117 its reverse (7115351151322), we get a palindrome (9346862686439).

The spelling of 2231511535117 in words is "two trillion, two hundred thirty-one billion, five hundred eleven million, five hundred thirty-five thousand, one hundred seventeen".