155551255 has 8 divisors (see below), whose sum is σ = 187044624. Its totient is φ = 124185600.

The previous prime is 155551243. The next prime is 155551261. The reversal of 155551255 is 552155551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155551255 - 2⁵ = 155551223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155551255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29226 + ... + 34135.

It is an arithmetic number, because the mean of its divisors is an integer number (23380578).

Almost surely, 2^155551255 is an apocalyptic number.

155551255 is a deficient number, since it is larger than the sum of its proper divisors (31493369).

155551255 is an equidigital number, since it uses as much as digits as its factorization.

155551255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63857.

The product of its digits is 31250, while the sum is 34.

The square root of 155551255 is about 12472.0188822821. The cubic root of 155551255 is about 537.8045924581.

The spelling of 155551255 in words is "one hundred fifty-five million, five hundred fifty-one thousand, two hundred fifty-five".