1131355157 has 2 divisors, whose sum is σ = 1131355158. Its totient is φ = 1131355156.

The previous prime is 1131355123. The next prime is 1131355207. The reversal of 1131355157 is 7515531311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1012130596 + 119224561 = 31814^2 + 10919^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131355157 - 2¹⁴ = 1131338773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131355657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565677578 + 565677579.

It is an arithmetic number, because the mean of its divisors is an integer number (565677579).

Almost surely, 2^1131355157 is an apocalyptic number.

It is an amenable number.

1131355157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131355157 is an equidigital number, since it uses as much as digits as its factorization.

1131355157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7875, while the sum is 32.

The square root of 1131355157 is about 33635.6233330081. The cubic root of 1131355157 is about 1041.9966441341.

Adding to 1131355157 its reverse (7515531311), we get a palindrome (8646886468).

The spelling of 1131355157 in words is "one billion, one hundred thirty-one million, three hundred fifty-five thousand, one hundred fifty-seven".