551251403005 has 4 divisors (see below), whose sum is σ = 661501683612. Its totient is φ = 441001122400.

The previous prime is 551251402991. The next prime is 551251403077. The reversal of 551251403005 is 500304152155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500304152155 = 5 ⋅100060830431.

It can be written as a sum of positive squares in 2 ways, for example, as 403729347609 + 147522055396 = 635397^2 + 384086^2 .

It is not a de Polignac number, because 551251403005 - 2¹¹ = 551251400957 is a prime.

It is a super-3 number, since 3×551251403005³ (a number of 36 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (31) 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 congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55125140296 + ... + 55125140305.

It is an arithmetic number, because the mean of its divisors is an integer number (165375420903).

Almost surely, 2^551251403005 is an apocalyptic number.

It is an amenable number.

551251403005 is a deficient number, since it is larger than the sum of its proper divisors (110250280607).

551251403005 is a wasteful number, since it uses less digits than its factorization.

551251403005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110250280606.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 551251403005 in words is "five hundred fifty-one billion, two hundred fifty-one million, four hundred three thousand, five".