551106620 has 24 divisors (see below), whose sum is σ = 1163148000. Its totient is φ = 219333312.

The previous prime is 551106613. The next prime is 551106643. The reversal of 551106620 is 26601155.

It is a self number, because there is not a number n which added to its sum of digits gives 551106620.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 65255 + ... + 73214.

It is an arithmetic number, because the mean of its divisors is an integer number (48464500).

Almost surely, 2^551106620 is an apocalyptic number.

It is an amenable number.

551106620 is an abundant number, since it is smaller than the sum of its proper divisors (612041380).

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

551106620 is a wasteful number, since it uses less digits than its factorization.

551106620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138677 (or 138675 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 551106620 is about 23475.6601611116. The cubic root of 551106620 is about 819.8704038698.

Adding to 551106620 its reverse (26601155), we get a palindrome (577707775).

The spelling of 551106620 in words is "five hundred fifty-one million, one hundred six thousand, six hundred twenty".