1255515055 has 4 divisors (see below), whose sum is σ = 1506618072. Its totient is φ = 1004412040.

The previous prime is 1255515049. The next prime is 1255515073. The reversal of 1255515055 is 5505155521.

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

It is not a de Polignac number, because 1255515055 - 2³ = 1255515047 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 1255515055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125551501 + ... + 125551510.

It is an arithmetic number, because the mean of its divisors is an integer number (376654518).

Almost surely, 2^1255515055 is an apocalyptic number.

1255515055 is a deficient number, since it is larger than the sum of its proper divisors (251103017).

1255515055 is an equidigital number, since it uses as much as digits as its factorization.

1255515055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251103016.

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

The square root of 1255515055 is about 35433.2478754065. The cubic root of 1255515055 is about 1078.7992642341.

The spelling of 1255515055 in words is "one billion, two hundred fifty-five million, five hundred fifteen thousand, fifty-five".