115203145 has 4 divisors (see below), whose sum is σ = 138243780. Its totient is φ = 92162512.

The previous prime is 115203139. The next prime is 115203199. The reversal of 115203145 is 541302511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541302511 = 83 ⋅6521717.

It can be written as a sum of positive squares in 2 ways, for example, as 82519056 + 32684089 = 9084^2 + 5717^2 .

It is a cyclic number.

It is not a de Polignac number, because 115203145 - 2⁷ = 115203017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11520310 + ... + 11520319.

It is an arithmetic number, because the mean of its divisors is an integer number (34560945).

Almost surely, 2^115203145 is an apocalyptic number.

It is an amenable number.

115203145 is a deficient number, since it is larger than the sum of its proper divisors (23040635).

115203145 is an equidigital number, since it uses as much as digits as its factorization.

115203145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23040634.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 115203145 is about 10733.2728000363. The cubic root of 115203145 is about 486.5805875049.

Adding to 115203145 its reverse (541302511), we get a palindrome (656505656).

The spelling of 115203145 in words is "one hundred fifteen million, two hundred three thousand, one hundred forty-five".