545257281 has 8 divisors (see below), whose sum is σ = 727565344. Its totient is φ = 363227040.

The previous prime is 545257277. The next prime is 545257283. The reversal of 545257281 is 182752545.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 545257281 - 2² = 545257277 is a prime.

It is a super-2 number, since 2×545257281² = 594611004967025922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545257283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64831 + ... + 72756.

It is an arithmetic number, because the mean of its divisors is an integer number (90945668).

Almost surely, 2^545257281 is an apocalyptic number.

It is an amenable number.

545257281 is a deficient number, since it is larger than the sum of its proper divisors (182308063).

545257281 is a wasteful number, since it uses less digits than its factorization.

545257281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138911.

The product of its digits is 112000, while the sum is 39.

The square root of 545257281 is about 23350.7447632832. The cubic root of 545257281 is about 816.9594320238.

The spelling of 545257281 in words is "five hundred forty-five million, two hundred fifty-seven thousand, two hundred eighty-one".