551243225242 has 8 divisors (see below), whose sum is σ = 826915512276. Its totient is φ = 275604721152.

The previous prime is 551243225237. The next prime is 551243225297. The reversal of 551243225242 is 242522342155.

It can be written as a sum of positive squares in 2 ways, for example, as 535807896121 + 15435329121 = 731989^2 + 124239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 8404903 + ... + 8470234.

Almost surely, 2^551243225242 is an apocalyptic number.

551243225242 is a deficient number, since it is larger than the sum of its proper divisors (275672287034).

551243225242 is a wasteful number, since it uses less digits than its factorization.

551243225242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16891472.

The product of its digits is 192000, while the sum is 37.

Adding to 551243225242 its reverse (242522342155), we get a palindrome (793765567397).

The spelling of 551243225242 in words is "five hundred fifty-one billion, two hundred forty-three million, two hundred twenty-five thousand, two hundred forty-two".