545155257 has 4 divisors (see below), whose sum is σ = 726873680. Its totient is φ = 363436836.

The previous prime is 545155217. The next prime is 545155267. The reversal of 545155257 is 752551545.

545155257 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 545155257 - 2⁷ = 545155129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545155217) 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, 90859207 + ... + 90859212.

It is an arithmetic number, because the mean of its divisors is an integer number (181718420).

Almost surely, 2^545155257 is an apocalyptic number.

It is an amenable number.

545155257 is a deficient number, since it is larger than the sum of its proper divisors (181718423).

545155257 is a wasteful number, since it uses less digits than its factorization.

545155257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181718422.

The product of its digits is 175000, while the sum is 39.

The square root of 545155257 is about 23348.5600626677. The cubic root of 545155257 is about 816.9084746310.

The spelling of 545155257 in words is "five hundred forty-five million, one hundred fifty-five thousand, two hundred fifty-seven".