145515115 has 4 divisors (see below), whose sum is σ = 174618144. Its totient is φ = 116412088.

The previous prime is 145515107. The next prime is 145515137. The reversal of 145515115 is 511515541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 511515541 = 431 ⋅1186811.

It is a cyclic number.

It is not a de Polignac number, because 145515115 - 2³ = 145515107 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14551507 + ... + 14551516.

It is an arithmetic number, because the mean of its divisors is an integer number (43654536).

Almost surely, 2^145515115 is an apocalyptic number.

145515115 is a deficient number, since it is larger than the sum of its proper divisors (29103029).

145515115 is an equidigital number, since it uses as much as digits as its factorization.

145515115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29103028.

The product of its digits is 2500, while the sum is 28.

The square root of 145515115 is about 12062.9646024516. The cubic root of 145515115 is about 525.9801673911.

The spelling of 145515115 in words is "one hundred forty-five million, five hundred fifteen thousand, one hundred fifteen".