151115509 has 2 divisors, whose sum is σ = 151115510. Its totient is φ = 151115508.

The previous prime is 151115479. The next prime is 151115539. The reversal of 151115509 is 905511151.

151115509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (151115479) and next prime (151115539).

It can be written as a sum of positive squares in only one way, i.e., 124880625 + 26234884 = 11175^2 + 5122^2 .

It is an emirp because it is prime and its reverse (905511151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 151115509 - 2²⁵ = 117561077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151115539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75557754 + 75557755.

It is an arithmetic number, because the mean of its divisors is an integer number (75557755).

Almost surely, 2^151115509 is an apocalyptic number.

It is an amenable number.

151115509 is a deficient number, since it is larger than the sum of its proper divisors (1).

151115509 is an equidigital number, since it uses as much as digits as its factorization.

151115509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1125, while the sum is 28.

The square root of 151115509 is about 12292.9048235151. The cubic root of 151115509 is about 532.6431498880.

It can be divided in two parts, 1511 and 15509, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 151115509 in words is "one hundred fifty-one million, one hundred fifteen thousand, five hundred nine".