551520413 has 4 divisors (see below), whose sum is σ = 551632320. Its totient is φ = 551408508.

The previous prime is 551520407. The next prime is 551520439. The reversal of 551520413 is 314025155.

551520413 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: 314025155 = 5 ⋅62805031.

It is a cyclic number.

It is not a de Polignac number, because 551520413 - 2⁸ = 551520157 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 (551520313) 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, 48203 + ... + 58536.

It is an arithmetic number, because the mean of its divisors is an integer number (137908080).

Almost surely, 2^551520413 is an apocalyptic number.

It is an amenable number.

551520413 is a deficient number, since it is larger than the sum of its proper divisors (111907).

551520413 is a wasteful number, since it uses less digits than its factorization.

551520413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111906.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 551520413 is about 23484.4717419830. The cubic root of 551520413 is about 820.0755497514.

Adding to 551520413 its reverse (314025155), we get a palindrome (865545568).

The spelling of 551520413 in words is "five hundred fifty-one million, five hundred twenty thousand, four hundred thirteen".