155165441 has 2 divisors, whose sum is σ = 155165442. Its totient is φ = 155165440.

The previous prime is 155165411. The next prime is 155165473. The reversal of 155165441 is 144561551.

It is an a-pointer prime, because the next prime (155165473) can be obtained adding 155165441 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155127025 + 38416 = 12455^2 + 196^2 .

It is an emirp because it is prime and its reverse (144561551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155165441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155165398 and 155165407.

It is not a weakly prime, because it can be changed into another prime (155165411) by changing a digit.

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 as a sum of consecutive naturals, namely, 77582720 + 77582721.

It is an arithmetic number, because the mean of its divisors is an integer number (77582721).

Almost surely, 2^155165441 is an apocalyptic number.

It is an amenable number.

155165441 is a deficient number, since it is larger than the sum of its proper divisors (1).

155165441 is an equidigital number, since it uses as much as digits as its factorization.

155165441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 32.

The square root of 155165441 is about 12456.5420964247. The cubic root of 155165441 is about 537.3595851713.

The spelling of 155165441 in words is "one hundred fifty-five million, one hundred sixty-five thousand, four hundred forty-one".