545120251 has 4 divisors (see below), whose sum is σ = 587052592. Its totient is φ = 503187912.

The previous prime is 545120243. The next prime is 545120267. The reversal of 545120251 is 152021545.

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 545120251 - 2³ = 545120243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545120291) 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, 20966151 + ... + 20966176.

It is an arithmetic number, because the mean of its divisors is an integer number (146763148).

Almost surely, 2^545120251 is an apocalyptic number.

545120251 is a deficient number, since it is larger than the sum of its proper divisors (41932341).

545120251 is a wasteful number, since it uses less digits than its factorization.

545120251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41932340.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 545120251 is about 23347.8104112570. The cubic root of 545120251 is about 816.8909889027.

Adding to 545120251 its reverse (152021545), we get a palindrome (697141796).

The spelling of 545120251 in words is "five hundred forty-five million, one hundred twenty thousand, two hundred fifty-one".