545515 has 4 divisors (see below), whose sum is σ = 654624. Its totient is φ = 436408.

The previous prime is 545497. The next prime is 545521. The reversal of 545515 is 515545.

545515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 545515 - 2⁵ = 545483 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 545515.

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, 54547 + ... + 54556.

It is an arithmetic number, because the mean of its divisors is an integer number (163656).

2⁵⁴⁵⁵¹⁵ is an apocalyptic number.

545515 is a deficient number, since it is larger than the sum of its proper divisors (109109).

545515 is a wasteful number, since it uses less digits than its factorization.

545515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109108.

The product of its digits is 2500, while the sum is 25.

The square root of 545515 is about 738.5898726628. The cubic root of 545515 is about 81.7088125280.

Subtracting from 545515 its sum of digits (25), we obtain a triangular number (545490 = T₁₀₄₄).

The spelling of 545515 in words is "five hundred forty-five thousand, five hundred fifteen".