1151231115 has 8 divisors (see below), whose sum is σ = 1841969808. Its totient is φ = 613989920.

The previous prime is 1151231111. The next prime is 1151231117. The reversal of 1151231115 is 5111321511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1151231115 - 2² = 1151231111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1151231091 and 1151231100.

It is not an unprimeable number, because it can be changed into a prime (1151231111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38374356 + ... + 38374385.

It is an arithmetic number, because the mean of its divisors is an integer number (230246226).

Almost surely, 2^1151231115 is an apocalyptic number.

1151231115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1151231115 is a deficient number, since it is larger than the sum of its proper divisors (690738693).

1151231115 is an equidigital number, since it uses as much as digits as its factorization.

1151231115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76748749.

The product of its digits is 150, while the sum is 21.

The square root of 1151231115 is about 33929.7968605767. The cubic root of 1151231115 is about 1048.0632825426.

Adding to 1151231115 its reverse (5111321511), we get a palindrome (6262552626).

The spelling of 1151231115 in words is "one billion, one hundred fifty-one million, two hundred thirty-one thousand, one hundred fifteen".