1015555055 has 4 divisors (see below), whose sum is σ = 1218666072. Its totient is φ = 812444040.

The previous prime is 1015555043. The next prime is 1015555081. The reversal of 1015555055 is 5505555101.

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

It is not a de Polignac number, because 1015555055 - 2⁴ = 1015555039 is a prime.

It is a Duffinian number.

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, 101555501 + ... + 101555510.

It is an arithmetic number, because the mean of its divisors is an integer number (304666518).

Almost surely, 2^1015555055 is an apocalyptic number.

1015555055 is a deficient number, since it is larger than the sum of its proper divisors (203111017).

1015555055 is an equidigital number, since it uses as much as digits as its factorization.

1015555055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203111016.

The product of its (nonzero) digits is 15625, while the sum is 32.

The square root of 1015555055 is about 31867.7745536145. The cubic root of 1015555055 is about 1005.1583638631.

The spelling of 1015555055 in words is "one billion, fifteen million, five hundred fifty-five thousand, fifty-five".