551820125 has 16 divisors (see below), whose sum is σ = 689695344. Its totient is φ = 440800000.

The previous prime is 551820121. The next prime is 551820133. The reversal of 551820125 is 521028155.

It can be written as a sum of positive squares in 8 ways, for example, as 199769956 + 352050169 = 14134^2 + 18763^2 .

It is not a de Polignac number, because 551820125 - 2² = 551820121 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 (551820121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92225 + ... + 98025.

It is an arithmetic number, because the mean of its divisors is an integer number (43105959).

Almost surely, 2^551820125 is an apocalyptic number.

It is an amenable number.

551820125 is a deficient number, since it is larger than the sum of its proper divisors (137875219).

551820125 is an equidigital number, since it uses as much as digits as its factorization.

551820125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6577 (or 6567 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 29.

The square root of 551820125 is about 23490.8519428309. The cubic root of 551820125 is about 820.2240737034.

The spelling of 551820125 in words is "five hundred fifty-one million, eight hundred twenty thousand, one hundred twenty-five".