551855827 has 2 divisors, whose sum is σ = 551855828. Its totient is φ = 551855826.

The previous prime is 551855809. The next prime is 551855833. The reversal of 551855827 is 728558155.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551855827 is a prime.

It is not a weakly prime, because it can be changed into another prime (551855867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275927913 + 275927914.

It is an arithmetic number, because the mean of its divisors is an integer number (275927914).

Almost surely, 2^551855827 is an apocalyptic number.

551855827 is a deficient number, since it is larger than the sum of its proper divisors (1).

551855827 is an equidigital number, since it uses as much as digits as its factorization.

551855827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560000, while the sum is 46.

The square root of 551855827 is about 23491.6118433793. The cubic root of 551855827 is about 820.2417624436.

The spelling of 551855827 in words is "five hundred fifty-one million, eight hundred fifty-five thousand, eight hundred twenty-seven".