545218257 has 8 divisors (see below), whose sum is σ = 727099776. Its totient is φ = 363407792.

The previous prime is 545218249. The next prime is 545218291. The reversal of 545218257 is 752812545.

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

It is a cyclic number.

It is not a de Polignac number, because 545218257 - 2³ = 545218249 is a prime.

It is a super-2 number, since 2×545218257² = 594525895532236098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (545218207) 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, 3928 + ... + 33254.

It is an arithmetic number, because the mean of its divisors is an integer number (90887472).

Almost surely, 2^545218257 is an apocalyptic number.

It is an amenable number.

545218257 is a deficient number, since it is larger than the sum of its proper divisors (181881519).

545218257 is a wasteful number, since it uses less digits than its factorization.

545218257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35527.

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

The square root of 545218257 is about 23349.9091432922. The cubic root of 545218257 is about 816.9399416617.

The spelling of 545218257 in words is "five hundred forty-five million, two hundred eighteen thousand, two hundred fifty-seven".