555000155 has 4 divisors (see below), whose sum is σ = 666000192. Its totient is φ = 444000120.

The previous prime is 555000133. The next prime is 555000157. The reversal of 555000155 is 551000555.

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

It is not a de Polignac number, because 555000155 - 2²⁴ = 538222939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (555000157) 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, 55500011 + ... + 55500020.

It is an arithmetic number, because the mean of its divisors is an integer number (166500048).

Almost surely, 2^555000155 is an apocalyptic number.

555000155 is a deficient number, since it is larger than the sum of its proper divisors (111000037).

555000155 is a wasteful number, since it uses less digits than its factorization.

555000155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111000036.

The product of its (nonzero) digits is 3125, while the sum is 26.

The square root of 555000155 is about 23558.4412684711. The cubic root of 555000155 is about 821.7966529913.

The spelling of 555000155 in words is "five hundred fifty-five million, one hundred fifty-five", and thus it is an aban number.