1131156145251 has 24 divisors (see below), whose sum is σ = 1843890899760. Its totient is φ = 661909550400.

The previous prime is 1131156145199. The next prime is 1131156145271. The reversal of 1131156145251 is 1525416511311.

1131156145251 is a `hidden beast` number, since 1 + 1 + 3 + 1 + 1 + 561 + 45 + 2 + 51 = 666.

It is not a de Polignac number, because 1131156145251 - 2⁷ = 1131156145123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131156145271) 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 in 23 ways as a sum of consecutive naturals, for example, 196994020 + ... + 196999761.

It is an arithmetic number, because the mean of its divisors is an integer number (76828787490).

Almost surely, 2^{1131156145251} is an apocalyptic number.

1131156145251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1131156145251 is a deficient number, since it is larger than the sum of its proper divisors (712734754509).

1131156145251 is a wasteful number, since it uses less digits than its factorization.

1131156145251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393993827 (or 393993824 counting only the distinct ones).

The product of its digits is 18000, while the sum is 36.

The spelling of 1131156145251 in words is "one trillion, one hundred thirty-one billion, one hundred fifty-six million, one hundred forty-five thousand, two hundred fifty-one".