503425551 has 4 divisors (see below), whose sum is σ = 671234072. Its totient is φ = 335617032.

The previous prime is 503425519. The next prime is 503425561. The reversal of 503425551 is 155524305.

It is a happy number.

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

It is not a de Polignac number, because 503425551 - 2⁵ = 503425519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503425561) 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, 83904256 + ... + 83904261.

It is an arithmetic number, because the mean of its divisors is an integer number (167808518).

Almost surely, 2^503425551 is an apocalyptic number.

503425551 is a deficient number, since it is larger than the sum of its proper divisors (167808521).

503425551 is a wasteful number, since it uses less digits than its factorization.

503425551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167808520.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 503425551 is about 22437.1466768839. The cubic root of 503425551 is about 795.5089767106.

Adding to 503425551 its reverse (155524305), we get a palindrome (658949856).

The spelling of 503425551 in words is "five hundred three million, four hundred twenty-five thousand, five hundred fifty-one".