155320115 has 8 divisors (see below), whose sum is σ = 186451440. Its totient is φ = 124211232.

The previous prime is 155320093. The next prime is 155320147. The reversal of 155320115 is 511023551.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 155320115 - 2⁸ = 155319859 is a prime.

It is a super-2 number, since 2×155320115² = 48248676247226450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21821 + ... + 28049.

It is an arithmetic number, because the mean of its divisors is an integer number (23306430).

Almost surely, 2^155320115 is an apocalyptic number.

155320115 is a deficient number, since it is larger than the sum of its proper divisors (31131325).

155320115 is an equidigital number, since it uses as much as digits as its factorization.

155320115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11221.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 155320115 is about 12462.7490948025. The cubic root of 155320115 is about 537.5380784273.

Adding to 155320115 its reverse (511023551), we get a palindrome (666343666).

The spelling of 155320115 in words is "one hundred fifty-five million, three hundred twenty thousand, one hundred fifteen".