1115001231 has 4 divisors (see below), whose sum is σ = 1486668312. Its totient is φ = 743334152.

The previous prime is 1115001133. The next prime is 1115001241. The reversal of 1115001231 is 1321005111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1115001231 - 2¹¹ = 1114999183 is a prime.

It is a super-2 number, since 2×1115001231² = 2486455490263030722, 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 1115001231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115001241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185833536 + ... + 185833541.

It is an arithmetic number, because the mean of its divisors is an integer number (371667078).

Almost surely, 2^1115001231 is an apocalyptic number.

1115001231 is a deficient number, since it is larger than the sum of its proper divisors (371667081).

1115001231 is an equidigital number, since it uses as much as digits as its factorization.

1115001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371667080.

The product of its (nonzero) digits is 30, while the sum is 15.

The square root of 1115001231 is about 33391.6341468937. The cubic root of 1115001231 is about 1036.9515114303.

Adding to 1115001231 its reverse (1321005111), we get a palindrome (2436006342).

The spelling of 1115001231 in words is "one billion, one hundred fifteen million, one thousand, two hundred thirty-one".