1111231559 has 2 divisors, whose sum is σ = 1111231560. Its totient is φ = 1111231558.

The previous prime is 1111231439. The next prime is 1111231573. The reversal of 1111231559 is 9551321111.

It is a strong prime.

It is an emirp because it is prime and its reverse (9551321111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111231559 - 2²⁸ = 842796103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111230559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555615779 + 555615780.

It is an arithmetic number, because the mean of its divisors is an integer number (555615780).

Almost surely, 2^1111231559 is an apocalyptic number.

1111231559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111231559 is an equidigital number, since it uses as much as digits as its factorization.

1111231559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 29.

The square root of 1111231559 is about 33335.1400027059. The cubic root of 1111231559 is about 1035.7815932586.

The spelling of 1111231559 in words is "one billion, one hundred eleven million, two hundred thirty-one thousand, five hundred fifty-nine".