551350415021 has 4 divisors (see below), whose sum is σ = 630114760032. Its totient is φ = 472586070012.

The previous prime is 551350415017. The next prime is 551350415039. The reversal of 551350415021 is 120514053155.

551350415021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120514053155 = 5 ⋅24102810631.

It is not a de Polignac number, because 551350415021 - 2² = 551350415017 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 (551350415041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39382172495 + ... + 39382172508.

It is an arithmetic number, because the mean of its divisors is an integer number (157528690008).

Almost surely, 2^551350415021 is an apocalyptic number.

It is an amenable number.

551350415021 is a deficient number, since it is larger than the sum of its proper divisors (78764345011).

551350415021 is an equidigital number, since it uses as much as digits as its factorization.

551350415021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78764345010.

The product of its (nonzero) digits is 15000, while the sum is 32.

Adding to 551350415021 its reverse (120514053155), we get a palindrome (671864468176).

The spelling of 551350415021 in words is "five hundred fifty-one billion, three hundred fifty million, four hundred fifteen thousand, twenty-one".