1131551552251 has 2 divisors, whose sum is σ = 1131551552252. Its totient is φ = 1131551552250.

The previous prime is 1131551552237. The next prime is 1131551552281. The reversal of 1131551552251 is 1522551551311.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131551552251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131551552251.

It is not a weakly prime, because it can be changed into another prime (1131551552231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565775776125 + 565775776126.

It is an arithmetic number, because the mean of its divisors is an integer number (565775776126).

Almost surely, 2^{1131551552251} is an apocalyptic number.

1131551552251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131551552251 is an equidigital number, since it uses as much as digits as its factorization.

1131551552251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37500, while the sum is 37.

The spelling of 1131551552251 in words is "one trillion, one hundred thirty-one billion, five hundred fifty-one million, five hundred fifty-two thousand, two hundred fifty-one".