551616211 has 2 divisors, whose sum is σ = 551616212. Its totient is φ = 551616210.

The previous prime is 551616181. The next prime is 551616217. The reversal of 551616211 is 112616155.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551616211 - 2¹¹ = 551614163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551616211.

It is not a weakly prime, because it can be changed into another prime (551616217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275808105 + 275808106.

It is an arithmetic number, because the mean of its divisors is an integer number (275808106).

Almost surely, 2^551616211 is an apocalyptic number.

551616211 is a deficient number, since it is larger than the sum of its proper divisors (1).

551616211 is an equidigital number, since it uses as much as digits as its factorization.

551616211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 28.

The square root of 551616211 is about 23486.5112564638. The cubic root of 551616211 is about 820.1230288337.

The spelling of 551616211 in words is "five hundred fifty-one million, six hundred sixteen thousand, two hundred eleven".