155265553 has 4 divisors (see below), whose sum is σ = 155467188. Its totient is φ = 155063920.

The previous prime is 155265541. The next prime is 155265611. The reversal of 155265553 is 355562551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35319249 + 119946304 = 5943^2 + 10952^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155265553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155265053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99658 + ... + 101203.

It is an arithmetic number, because the mean of its divisors is an integer number (38866797).

Almost surely, 2^155265553 is an apocalyptic number.

It is an amenable number.

155265553 is a deficient number, since it is larger than the sum of its proper divisors (201635).

155265553 is an equidigital number, since it uses as much as digits as its factorization.

155265553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201634.

The product of its digits is 112500, while the sum is 37.

The square root of 155265553 is about 12460.5598991378. The cubic root of 155265553 is about 537.4751276033.

The spelling of 155265553 in words is "one hundred fifty-five million, two hundred sixty-five thousand, five hundred fifty-three".