155120423 has 2 divisors, whose sum is σ = 155120424. Its totient is φ = 155120422.

The previous prime is 155120419. The next prime is 155120429. The reversal of 155120423 is 324021551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155120423 - 2² = 155120419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155120429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77560211 + 77560212.

It is an arithmetic number, because the mean of its divisors is an integer number (77560212).

Almost surely, 2^155120423 is an apocalyptic number.

155120423 is a deficient number, since it is larger than the sum of its proper divisors (1).

155120423 is an equidigital number, since it uses as much as digits as its factorization.

155120423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 155120423 is about 12454.7349630572. The cubic root of 155120423 is about 537.3076122717.

Adding to 155120423 its reverse (324021551), we get a palindrome (479141974).

The spelling of 155120423 in words is "one hundred fifty-five million, one hundred twenty thousand, four hundred twenty-three".