551430513 has 12 divisors (see below), whose sum is σ = 843364548. Its totient is φ = 345995520.

The previous prime is 551430491. The next prime is 551430533. The reversal of 551430513 is 315034155.

551430513 is a `hidden beast` number, since 5 + 5 + 143 + 0 + 513 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 201441249 + 349989264 = 14193^2 + 18708^2 .

It is not a de Polignac number, because 551430513 - 2¹⁸ = 551168369 is a prime.

It is a super-2 number, since 2×551430513² = 608151221334886338, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (551430533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1801908 + ... + 1802213.

It is an arithmetic number, because the mean of its divisors is an integer number (70280379).

Almost surely, 2^551430513 is an apocalyptic number.

It is an amenable number.

551430513 is a deficient number, since it is larger than the sum of its proper divisors (291934035).

551430513 is a wasteful number, since it uses less digits than its factorization.

551430513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604144 (or 3604141 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 551430513 is about 23482.5576332733. The cubic root of 551430513 is about 820.0309888150.

Adding to 551430513 its reverse (315034155), we get a palindrome (866464668).

The spelling of 551430513 in words is "five hundred fifty-one million, four hundred thirty thousand, five hundred thirteen".