155122655 has 4 divisors (see below), whose sum is σ = 186147192. Its totient is φ = 124098120.

The previous prime is 155122619. The next prime is 155122661. The reversal of 155122655 is 556221551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556221551 = 3593 ⋅154807.

It is a de Polignac number, because none of the positive numbers 2^k-155122655 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15512261 + ... + 15512270.

It is an arithmetic number, because the mean of its divisors is an integer number (46536798).

Almost surely, 2^155122655 is an apocalyptic number.

155122655 is a deficient number, since it is larger than the sum of its proper divisors (31024537).

155122655 is an equidigital number, since it uses as much as digits as its factorization.

155122655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31024536.

The product of its digits is 15000, while the sum is 32.

The square root of 155122655 is about 12454.8245672109. The cubic root of 155122655 is about 537.3101893337.

The spelling of 155122655 in words is "one hundred fifty-five million, one hundred twenty-two thousand, six hundred fifty-five".