11331311251537 has 2 divisors, whose sum is σ = 11331311251538. Its totient is φ = 11331311251536.

The previous prime is 11331311251487. The next prime is 11331311251541. The reversal of 11331311251537 is 73515211313311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10251324729361 + 1079986522176 = 3201769^2 + 1039224^2 .

It is a cyclic number.

It is not a de Polignac number, because 11331311251537 - 2⁴³ = 2535218229329 is a prime.

It is a super-2 number, since 2×11331311251537² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11331311251496 and 11331311251505.

It is not a weakly prime, because it can be changed into another prime (11331311251567) 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 as a sum of consecutive naturals, namely, 5665655625768 + 5665655625769.

It is an arithmetic number, because the mean of its divisors is an integer number (5665655625769).

Almost surely, 2^{11331311251537} is an apocalyptic number.

It is an amenable number.

11331311251537 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331311251537 is an equidigital number, since it uses as much as digits as its factorization.

11331311251537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28350, while the sum is 37.

Adding to 11331311251537 its reverse (73515211313311), we get a palindrome (84846522564848).

The spelling of 11331311251537 in words is "eleven trillion, three hundred thirty-one billion, three hundred eleven million, two hundred fifty-one thousand, five hundred thirty-seven".