155265263 has 4 divisors (see below), whose sum is σ = 155290200. Its totient is φ = 155240328.

The previous prime is 155265259. The next prime is 155265269. The reversal of 155265263 is 362562551.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 362562551 = 13 ⋅27889427.

It is a cyclic number.

It is not a de Polignac number, because 155265263 - 2² = 155265259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155265269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5588 + ... + 18486.

It is an arithmetic number, because the mean of its divisors is an integer number (38822550).

Almost surely, 2^155265263 is an apocalyptic number.

155265263 is a deficient number, since it is larger than the sum of its proper divisors (24937).

155265263 is a wasteful number, since it uses less digits than its factorization.

155265263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24936.

The product of its digits is 54000, while the sum is 35.

The square root of 155265263 is about 12460.5482624161. The cubic root of 155265263 is about 537.4747929769.

The spelling of 155265263 in words is "one hundred fifty-five million, two hundred sixty-five thousand, two hundred sixty-three".