545144251 has 4 divisors (see below), whose sum is σ = 554081104. Its totient is φ = 536207400.

The previous prime is 545144231. The next prime is 545144261. The reversal of 545144251 is 152441545.

It is a happy number.

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 545144251 - 2¹⁹ = 544619963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545144221) 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, 4468335 + ... + 4468456.

It is an arithmetic number, because the mean of its divisors is an integer number (138520276).

Almost surely, 2^545144251 is an apocalyptic number.

545144251 is a deficient number, since it is larger than the sum of its proper divisors (8936853).

545144251 is an equidigital number, since it uses as much as digits as its factorization.

545144251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8936852.

The product of its digits is 16000, while the sum is 31.

The square root of 545144251 is about 23348.3243724255. The cubic root of 545144251 is about 816.9029771420.

Adding to 545144251 its reverse (152441545), we get a palindrome (697585796).

The spelling of 545144251 in words is "five hundred forty-five million, one hundred forty-four thousand, two hundred fifty-one".