1151111115 has 96 divisors (see below), whose sum is σ = 2570964480. Its totient is φ = 478336320.

The previous prime is 1151111111. The next prime is 1151111131. The reversal of 1151111115 is 5111111511.

It is not a de Polignac number, because 1151111115 - 2² = 1151111111 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1151111111) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 109312 + ... + 119378.

It is an arithmetic number, because the mean of its divisors is an integer number (26780880).

Almost surely, 2^1151111115 is an apocalyptic number.

1151111115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1151111115 is an abundant number, since it is smaller than the sum of its proper divisors (1419853365).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1151111115 is a wasteful number, since it uses less digits than its factorization.

1151111115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10110 (or 10093 counting only the distinct ones).

The product of its digits is 25, while the sum is 18.

The square root of 1151111115 is about 33928.0284573095. The cubic root of 1151111115 is about 1048.0268658862.

Adding to 1151111115 its reverse (5111111511), we get a palindrome (6262222626).

It can be divided in two parts, 11 and 51111115, that multiplied together give a palindrome (562222265).

The spelling of 1151111115 in words is "one billion, one hundred fifty-one million, one hundred eleven thousand, one hundred fifteen".