1115523151 has 4 divisors (see below), whose sum is σ = 1122628552. Its totient is φ = 1108417752.

The previous prime is 1115523139. The next prime is 1115523163. The reversal of 1115523151 is 1513255111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1513255111 = 31 ⋅48814681.

It is an interprime number because it is at equal distance from previous prime (1115523139) and next prime (1115523163).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1115523151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115523131) 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, 3552465 + ... + 3552778.

It is an arithmetic number, because the mean of its divisors is an integer number (280657138).

Almost surely, 2^1115523151 is an apocalyptic number.

1115523151 is a deficient number, since it is larger than the sum of its proper divisors (7105401).

1115523151 is an equidigital number, since it uses as much as digits as its factorization.

1115523151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7105400.

The product of its digits is 750, while the sum is 25.

The square root of 1115523151 is about 33399.4483637080. The cubic root of 1115523151 is about 1037.1132814491.

Adding to 1115523151 its reverse (1513255111), we get a palindrome (2628778262).

The spelling of 1115523151 in words is "one billion, one hundred fifteen million, five hundred twenty-three thousand, one hundred fifty-one".