155342441 has 2 divisors, whose sum is σ = 155342442. Its totient is φ = 155342440.

The previous prime is 155342393. The next prime is 155342443. The reversal of 155342441 is 144243551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108076816 + 47265625 = 10396^2 + 6875^2 .

It is an emirp because it is prime and its reverse (144243551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155342441 - 2⁶ = 155342377 is a prime.

Together with 155342443, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155342443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77671220 + 77671221.

It is an arithmetic number, because the mean of its divisors is an integer number (77671221).

Almost surely, 2^155342441 is an apocalyptic number.

It is an amenable number.

155342441 is a deficient number, since it is larger than the sum of its proper divisors (1).

155342441 is an equidigital number, since it uses as much as digits as its factorization.

155342441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 29.

The square root of 155342441 is about 12463.6447718956. The cubic root of 155342441 is about 537.5638327651.

Adding to 155342441 its reverse (144243551), we get a palindrome (299585992).

The spelling of 155342441 in words is "one hundred fifty-five million, three hundred forty-two thousand, four hundred forty-one".