1131551752261 has 4 divisors (see below), whose sum is σ = 1293202002592. Its totient is φ = 969901501932.

The previous prime is 1131551752249. The next prime is 1131551752283. The reversal of 1131551752261 is 1622571551311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1131551752261 - 2²¹ = 1131549655109 is a prime.

It is a super-2 number, since 2×1131551752261² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131551752561) 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 in 3 ways as a sum of consecutive naturals, for example, 80825125155 + ... + 80825125168.

It is an arithmetic number, because the mean of its divisors is an integer number (323300500648).

Almost surely, 2^{1131551752261} is an apocalyptic number.

It is an amenable number.

1131551752261 is a deficient number, since it is larger than the sum of its proper divisors (161650250331).

1131551752261 is an equidigital number, since it uses as much as digits as its factorization.

1131551752261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161650250330.

The product of its digits is 63000, while the sum is 40.

The spelling of 1131551752261 in words is "one trillion, one hundred thirty-one billion, five hundred fifty-one million, seven hundred fifty-two thousand, two hundred sixty-one".