545255409 has 4 divisors (see below), whose sum is σ = 727007216. Its totient is φ = 363503604.

The previous prime is 545255401. The next prime is 545255429. The reversal of 545255409 is 904552545.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 545255409 - 2³ = 545255401 is a prime.

It is a super-2 number, since 2×545255409² = 594606922087514562, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (545255401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90875899 + ... + 90875904.

It is an arithmetic number, because the mean of its divisors is an integer number (181751804).

Almost surely, 2^545255409 is an apocalyptic number.

It is an amenable number.

545255409 is a deficient number, since it is larger than the sum of its proper divisors (181751807).

545255409 is a wasteful number, since it uses less digits than its factorization.

545255409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181751806.

The product of its (nonzero) digits is 180000, while the sum is 39.

The square root of 545255409 is about 23350.7046788743. The cubic root of 545255409 is about 816.9584970830.

The spelling of 545255409 in words is "five hundred forty-five million, two hundred fifty-five thousand, four hundred nine".