155511253 has 4 divisors (see below), whose sum is σ = 160873740. Its totient is φ = 150148768.

The previous prime is 155511247. The next prime is 155511269. The reversal of 155511253 is 352115551.

155511253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 125283249 + 30228004 = 11193^2 + 5498^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155511253 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 (155511353) 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, 2681200 + ... + 2681257.

It is an arithmetic number, because the mean of its divisors is an integer number (40218435).

Almost surely, 2^155511253 is an apocalyptic number.

It is an amenable number.

155511253 is a deficient number, since it is larger than the sum of its proper divisors (5362487).

155511253 is an equidigital number, since it uses as much as digits as its factorization.

155511253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362486.

The product of its digits is 3750, while the sum is 28.

The square root of 155511253 is about 12470.4151093699. The cubic root of 155511253 is about 537.7584873898.

The spelling of 155511253 in words is "one hundred fifty-five million, five hundred eleven thousand, two hundred fifty-three".