155122553 has 4 divisors (see below), whose sum is σ = 155409828. Its totient is φ = 154835280.

The previous prime is 155122549. The next prime is 155122571. The reversal of 155122553 is 355221551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355221551 = 29 ⋅12249019.

It can be written as a sum of positive squares in 2 ways, for example, as 51652969 + 103469584 = 7187^2 + 10172^2 .

It is a cyclic number.

It is not a de Polignac number, because 155122553 - 2² = 155122549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155122523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142826 + ... + 143907.

It is an arithmetic number, because the mean of its divisors is an integer number (38852457).

Almost surely, 2^155122553 is an apocalyptic number.

It is an amenable number.

155122553 is a deficient number, since it is larger than the sum of its proper divisors (287275).

155122553 is an equidigital number, since it uses as much as digits as its factorization.

155122553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287274.

The product of its digits is 7500, while the sum is 29.

The square root of 155122553 is about 12454.8204724115. The cubic root of 155122553 is about 537.3100715653.

The spelling of 155122553 in words is "one hundred fifty-five million, one hundred twenty-two thousand, five hundred fifty-three".