551915806 has 12 divisors (see below), whose sum is σ = 896455512. Its totient is φ = 254730216.

The previous prime is 551915803. The next prime is 551915807. The reversal of 551915806 is 608519155.

It is a super-2 number, since 2×551915806² = 609222113825259272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551915803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 816106 + ... + 816781.

It is an arithmetic number, because the mean of its divisors is an integer number (74704626).

Almost surely, 2^551915806 is an apocalyptic number.

551915806 is a deficient number, since it is larger than the sum of its proper divisors (344539706).

551915806 is a wasteful number, since it uses less digits than its factorization.

551915806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632915 (or 1632902 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 40.

The square root of 551915806 is about 23492.8884133050. Note that the first 3 decimals coincide. The cubic root of 551915806 is about 820.2714776312.

The spelling of 551915806 in words is "five hundred fifty-one million, nine hundred fifteen thousand, eight hundred six".