155522243 has 2 divisors, whose sum is σ = 155522244. Its totient is φ = 155522242.

The previous prime is 155522233. The next prime is 155522261. The reversal of 155522243 is 342225551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155522243 - 2⁶ = 155522179 is a prime.

It is equal to p_8737220 and since 155522243 and 8737220 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (155522203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77761121 + 77761122.

It is an arithmetic number, because the mean of its divisors is an integer number (77761122).

Almost surely, 2^155522243 is an apocalyptic number.

155522243 is a deficient number, since it is larger than the sum of its proper divisors (1).

155522243 is an equidigital number, since it uses as much as digits as its factorization.

155522243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 29.

The square root of 155522243 is about 12470.8557444948. The cubic root of 155522243 is about 537.7711549116.

Adding to 155522243 its reverse (342225551), we get a palindrome (497747794).

The spelling of 155522243 in words is "one hundred fifty-five million, five hundred twenty-two thousand, two hundred forty-three".