551364521 has 2 divisors, whose sum is σ = 551364522. Its totient is φ = 551364520.

The previous prime is 551364511. The next prime is 551364551. The reversal of 551364521 is 125463155.

551364521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 483120400 + 68244121 = 21980^2 + 8261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551364521 is a prime.

It is not a weakly prime, because it can be changed into another prime (551364511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275682260 + 275682261.

It is an arithmetic number, because the mean of its divisors is an integer number (275682261).

Almost surely, 2^551364521 is an apocalyptic number.

It is an amenable number.

551364521 is a deficient number, since it is larger than the sum of its proper divisors (1).

551364521 is an equidigital number, since it uses as much as digits as its factorization.

551364521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 32.

The square root of 551364521 is about 23481.1524631991. The cubic root of 551364521 is about 819.9982753285.

The spelling of 551364521 in words is "five hundred fifty-one million, three hundred sixty-four thousand, five hundred twenty-one".