551940449 has 2 divisors, whose sum is σ = 551940450. Its totient is φ = 551940448.

The previous prime is 551940421. The next prime is 551940503. The reversal of 551940449 is 944049155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 535089424 + 16851025 = 23132^2 + 4105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551940449 is a prime.

It is a Chen prime.

It is equal to p_28941980 and since 551940449 and 28941980 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (551640449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275970224 + 275970225.

It is an arithmetic number, because the mean of its divisors is an integer number (275970225).

Almost surely, 2^551940449 is an apocalyptic number.

It is an amenable number.

551940449 is a deficient number, since it is larger than the sum of its proper divisors (1).

551940449 is an equidigital number, since it uses as much as digits as its factorization.

551940449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 551940449 is about 23493.4128853175. The cubic root of 551940449 is about 820.2836858032.

The spelling of 551940449 in words is "five hundred fifty-one million, nine hundred forty thousand, four hundred forty-nine".