1545217055 has 4 divisors (see below), whose sum is σ = 1854260472. Its totient is φ = 1236173640.

The previous prime is 1545217043. The next prime is 1545217087. The reversal of 1545217055 is 5507125451.

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

It is not a de Polignac number, because 1545217055 - 2¹⁰ = 1545216031 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, 154521701 + ... + 154521710.

It is an arithmetic number, because the mean of its divisors is an integer number (463565118).

Almost surely, 2^1545217055 is an apocalyptic number.

1545217055 is a deficient number, since it is larger than the sum of its proper divisors (309043417).

1545217055 is an equidigital number, since it uses as much as digits as its factorization.

1545217055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309043416.

The product of its (nonzero) digits is 35000, while the sum is 35.

The square root of 1545217055 is about 39309.2489752730. The cubic root of 1545217055 is about 1156.1029187931.

The spelling of 1545217055 in words is "one billion, five hundred forty-five million, two hundred seventeen thousand, fifty-five".