155505115 has 4 divisors (see below), whose sum is σ = 186606144. Its totient is φ = 124404088.

The previous prime is 155505113. The next prime is 155505131. The reversal of 155505115 is 511505551.

155505115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 511505551 = 1151 ⋅444401.

It is a cyclic number.

It is not a de Polignac number, because 155505115 - 2¹ = 155505113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155505113) 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, 15550507 + ... + 15550516.

It is an arithmetic number, because the mean of its divisors is an integer number (46651536).

Almost surely, 2^155505115 is an apocalyptic number.

155505115 is a deficient number, since it is larger than the sum of its proper divisors (31101029).

155505115 is an equidigital number, since it uses as much as digits as its factorization.

155505115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31101028.

The product of its (nonzero) digits is 3125, while the sum is 28.

The square root of 155505115 is about 12470.1690044682. The cubic root of 155505115 is about 537.7514122211.

The spelling of 155505115 in words is "one hundred fifty-five million, five hundred five thousand, one hundred fifteen".