545145215 has 4 divisors (see below), whose sum is σ = 654174264. Its totient is φ = 436116168.

The previous prime is 545145193. The next prime is 545145221. The reversal of 545145215 is 512541545.

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 545145215 - 2¹⁰ = 545144191 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, 54514517 + ... + 54514526.

It is an arithmetic number, because the mean of its divisors is an integer number (163543566).

Almost surely, 2^545145215 is an apocalyptic number.

545145215 is a deficient number, since it is larger than the sum of its proper divisors (109029049).

545145215 is a wasteful number, since it uses less digits than its factorization.

545145215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109029048.

The product of its digits is 20000, while the sum is 32.

The square root of 545145215 is about 23348.3450162961. The cubic root of 545145215 is about 816.9034586622.

The spelling of 545145215 in words is "five hundred forty-five million, one hundred forty-five thousand, two hundred fifteen".