551010605021 has 24 divisors (see below), whose sum is σ = 607912811520. Its totient is φ = 498006786816.

The previous prime is 551010605011. The next prime is 551010605051. The reversal of 551010605021 is 120506010155.

It is a de Polignac number, because none of the positive numbers 2^k-551010605021 is a prime.

It is a super-2 number, since 2×551010605021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551010605011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3777965 + ... + 3921101.

It is an arithmetic number, because the mean of its divisors is an integer number (25329700480).

Almost surely, 2^551010605021 is an apocalyptic number.

It is an amenable number.

551010605021 is a deficient number, since it is larger than the sum of its proper divisors (56902206499).

551010605021 is a wasteful number, since it uses less digits than its factorization.

551010605021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143585 (or 143562 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 551010605021 its reverse (120506010155), we get a palindrome (671516615176).

The spelling of 551010605021 in words is "five hundred fifty-one billion, ten million, six hundred five thousand, twenty-one".