1155107231 has 2 divisors, whose sum is σ = 1155107232. Its totient is φ = 1155107230.

The previous prime is 1155107201. The next prime is 1155107257. The reversal of 1155107231 is 1327015511.

It is an a-pointer prime, because the next prime (1155107257) can be obtained adding 1155107231 to its sum of digits (26).

It is a strong prime.

It is an emirp because it is prime and its reverse (1327015511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1155107231 - 2⁶ = 1155107167 is a prime.

It is a super-2 number, since 2×1155107231² = 2668545430216974722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1155107231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155107201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577553615 + 577553616.

It is an arithmetic number, because the mean of its divisors is an integer number (577553616).

Almost surely, 2^1155107231 is an apocalyptic number.

1155107231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155107231 is an equidigital number, since it uses as much as digits as its factorization.

1155107231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 1155107231 is about 33986.8685082930. The cubic root of 1155107231 is about 1049.2382172203.

The spelling of 1155107231 in words is "one billion, one hundred fifty-five million, one hundred seven thousand, two hundred thirty-one".