155115227 has 4 divisors (see below), whose sum is σ = 160118976. Its totient is φ = 150111480.

The previous prime is 155115223. The next prime is 155115241. The reversal of 155115227 is 722511551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 722511551 = 18979 ⋅38069.

It is a cyclic number.

It is not a de Polignac number, because 155115227 - 2² = 155115223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155115227.

It is not an unprimeable number, because it can be changed into a prime (155115223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2501828 + ... + 2501889.

It is an arithmetic number, because the mean of its divisors is an integer number (40029744).

Almost surely, 2^155115227 is an apocalyptic number.

155115227 is a deficient number, since it is larger than the sum of its proper divisors (5003749).

155115227 is an equidigital number, since it uses as much as digits as its factorization.

155115227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5003748.

The product of its digits is 3500, while the sum is 29.

The square root of 155115227 is about 12454.5263659442. The cubic root of 155115227 is about 537.3016128864.

Adding to 155115227 its reverse (722511551), we get a palindrome (877626778).

The spelling of 155115227 in words is "one hundred fifty-five million, one hundred fifteen thousand, two hundred twenty-seven".