545345551 has 32 divisors (see below), whose sum is σ = 601211520. Its totient is φ = 493516800.

The previous prime is 545345539. The next prime is 545345557. The reversal of 545345551 is 155543545.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 545345551 - 2¹⁷ = 545214479 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 545345551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545345557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5294566 + ... + 5294668.

It is an arithmetic number, because the mean of its divisors is an integer number (18787860).

Almost surely, 2^545345551 is an apocalyptic number.

545345551 is a deficient number, since it is larger than the sum of its proper divisors (55865969).

545345551 is a wasteful number, since it uses less digits than its factorization.

545345551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307.

The product of its digits is 150000, while the sum is 37.

The square root of 545345551 is about 23352.6347764016. The cubic root of 545345551 is about 817.0035146495.

The spelling of 545345551 in words is "five hundred forty-five million, three hundred forty-five thousand, five hundred fifty-one".