545215434251 has 4 divisors (see below), whose sum is σ = 545219405904. Its totient is φ = 545211462600.

The previous prime is 545215434191. The next prime is 545215434301. The reversal of 545215434251 is 152434512545.

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 545215434251 - 2¹⁰ = 545215433227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 545215434199 and 545215434208.

It is not an unprimeable number, because it can be changed into a prime (545215434551) 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, 1772255 + ... + 2057016.

It is an arithmetic number, because the mean of its divisors is an integer number (136304851476).

Almost surely, 2^545215434251 is an apocalyptic number.

545215434251 is a deficient number, since it is larger than the sum of its proper divisors (3971653).

545215434251 is a wasteful number, since it uses less digits than its factorization.

545215434251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3971652.

The product of its digits is 480000, while the sum is 41.

Adding to 545215434251 its reverse (152434512545), we get a palindrome (697649946796).

The spelling of 545215434251 in words is "five hundred forty-five billion, two hundred fifteen million, four hundred thirty-four thousand, two hundred fifty-one".