551513551 has 4 divisors (see below), whose sum is σ = 580540600. Its totient is φ = 522486504.

The previous prime is 551513549. The next prime is 551513593. The reversal of 551513551 is 155315155.

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

It is a cyclic number.

It is not a de Polignac number, because 551513551 - 2¹ = 551513549 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 (551513051) 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 3 ways as a sum of consecutive naturals, for example, 14513496 + ... + 14513533.

It is an arithmetic number, because the mean of its divisors is an integer number (145135150).

Almost surely, 2^551513551 is an apocalyptic number.

551513551 is a deficient number, since it is larger than the sum of its proper divisors (29027049).

551513551 is a wasteful number, since it uses less digits than its factorization.

551513551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29027048.

The product of its digits is 9375, while the sum is 31.

The square root of 551513551 is about 23484.3256449914. The cubic root of 551513551 is about 820.0721486190.

The spelling of 551513551 in words is "five hundred fifty-one million, five hundred thirteen thousand, five hundred fifty-one".