1565106055 has 4 divisors (see below), whose sum is σ = 1878127272. Its totient is φ = 1252084840.

The previous prime is 1565106043. The next prime is 1565106089. The reversal of 1565106055 is 5506015651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5506015651 = 38671 ⋅142381.

It is not a de Polignac number, because 1565106055 - 2⁹ = 1565105543 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 1565106055.

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, 156510601 + ... + 156510610.

It is an arithmetic number, because the mean of its divisors is an integer number (469531818).

Almost surely, 2^1565106055 is an apocalyptic number.

1565106055 is a deficient number, since it is larger than the sum of its proper divisors (313021217).

1565106055 is an equidigital number, since it uses as much as digits as its factorization.

1565106055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313021216.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 1565106055 is about 39561.4212965106. The cubic root of 1565106055 is about 1161.0419826436.

The spelling of 1565106055 in words is "one billion, five hundred sixty-five million, one hundred six thousand, fifty-five".