551220497 has 2 divisors, whose sum is σ = 551220498. Its totient is φ = 551220496.

The previous prime is 551220479. The next prime is 551220503. The reversal of 551220497 is 794022155.

Together with previous prime (551220479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 501715201 + 49505296 = 22399^2 + 7036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551220497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (551220797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275610248 + 275610249.

It is an arithmetic number, because the mean of its divisors is an integer number (275610249).

Almost surely, 2^551220497 is an apocalyptic number.

It is an amenable number.

551220497 is a deficient number, since it is larger than the sum of its proper divisors (1).

551220497 is an equidigital number, since it uses as much as digits as its factorization.

551220497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 551220497 is about 23478.0854628311. The cubic root of 551220497 is about 819.9268708331.

The spelling of 551220497 in words is "five hundred fifty-one million, two hundred twenty thousand, four hundred ninety-seven".