545022251 has 4 divisors (see below), whose sum is σ = 553957104. Its totient is φ = 536087400.

The previous prime is 545022241. The next prime is 545022263. The reversal of 545022251 is 152220545.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545022251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 545022251.

It is not an unprimeable number, because it can be changed into a prime (545022241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4467335 + ... + 4467456.

It is an arithmetic number, because the mean of its divisors is an integer number (138489276).

Almost surely, 2^545022251 is an apocalyptic number.

545022251 is a deficient number, since it is larger than the sum of its proper divisors (8934853).

545022251 is an equidigital number, since it uses as much as digits as its factorization.

545022251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8934852.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 545022251 is about 23345.7116190533. The cubic root of 545022251 is about 816.8420332734.

Adding to 545022251 its reverse (152220545), we get a palindrome (697242796).

The spelling of 545022251 in words is "five hundred forty-five million, twenty-two thousand, two hundred fifty-one".