551330350021 has 16 divisors (see below), whose sum is σ = 619514362368. Its totient is φ = 486311238000.

The previous prime is 551330349887. The next prime is 551330350033. The reversal of 551330350021 is 120053033155.

It is a cyclic number.

It is not a de Polignac number, because 551330350021 - 2¹⁹ = 551329825733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551330350061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3788191 + ... + 3931036.

It is an arithmetic number, because the mean of its divisors is an integer number (38719647648).

Almost surely, 2^551330350021 is an apocalyptic number.

It is an amenable number.

551330350021 is a deficient number, since it is larger than the sum of its proper divisors (68184012347).

551330350021 is a wasteful number, since it uses less digits than its factorization.

551330350021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7719432.

The product of its (nonzero) digits is 6750, while the sum is 28.

Adding to 551330350021 its reverse (120053033155), we get a palindrome (671383383176).

The spelling of 551330350021 in words is "five hundred fifty-one billion, three hundred thirty million, three hundred fifty thousand, twenty-one".