551432513 has 4 divisors (see below), whose sum is σ = 554944980. Its totient is φ = 547920048.

The previous prime is 551432509. The next prime is 551432533. The reversal of 551432513 is 315234155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 198443569 + 352988944 = 14087^2 + 18788^2 .

It is a cyclic number.

It is not a de Polignac number, because 551432513 - 2² = 551432509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551432503) 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, 1755998 + ... + 1756311.

It is an arithmetic number, because the mean of its divisors is an integer number (138736245).

Almost surely, 2^551432513 is an apocalyptic number.

It is an amenable number.

551432513 is a deficient number, since it is larger than the sum of its proper divisors (3512467).

551432513 is a wasteful number, since it uses less digits than its factorization.

551432513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512466.

The product of its digits is 9000, while the sum is 29.

The square root of 551432513 is about 23482.6002180338. The cubic root of 551432513 is about 820.0319802122.

Adding to 551432513 its reverse (315234155), we get a palindrome (866666668).

The spelling of 551432513 in words is "five hundred fifty-one million, four hundred thirty-two thousand, five hundred thirteen".