551025805 has 8 divisors (see below), whose sum is σ = 721342944. Its totient is φ = 400746000.

The previous prime is 551025767. The next prime is 551025809. The reversal of 551025805 is 508520155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-551025805 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 (551025809) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5009271 + ... + 5009380.

It is an arithmetic number, because the mean of its divisors is an integer number (90167868).

Almost surely, 2^551025805 is an apocalyptic number.

551025805 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

551025805 is a deficient number, since it is larger than the sum of its proper divisors (170317139).

551025805 is a wasteful number, since it uses less digits than its factorization.

551025805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10018667.

The product of its (nonzero) digits is 10000, while the sum is 31.

The square root of 551025805 is about 23473.9388471556. The cubic root of 551025805 is about 819.8303262857.

The spelling of 551025805 in words is "five hundred fifty-one million, twenty-five thousand, eight hundred five".