551538516 has 12 divisors (see below), whose sum is σ = 1286923232. Its totient is φ = 183846168.

The previous prime is 551538503. The next prime is 551538527. The reversal of 551538516 is 615835155.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22980760 + ... + 22980783.

Almost surely, 2^551538516 is an apocalyptic number.

It is an amenable number.

551538516 is an abundant number, since it is smaller than the sum of its proper divisors (735384716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551538516 is a wasteful number, since it uses less digits than its factorization.

551538516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45961550 (or 45961548 counting only the distinct ones).

The product of its digits is 90000, while the sum is 39.

The square root of 551538516 is about 23484.8571637130. The cubic root of 551538516 is about 820.0845223206.

The spelling of 551538516 in words is "five hundred fifty-one million, five hundred thirty-eight thousand, five hundred sixteen".