551641439 has 2 divisors, whose sum is σ = 551641440. Its totient is φ = 551641438.

The previous prime is 551641417. The next prime is 551641457. The reversal of 551641439 is 934146155.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551641439 is a prime.

It is equal to p_28927037 and since 551641439 and 28927037 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551641469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275820719 + 275820720.

It is an arithmetic number, because the mean of its divisors is an integer number (275820720).

Almost surely, 2^551641439 is an apocalyptic number.

551641439 is a deficient number, since it is larger than the sum of its proper divisors (1).

551641439 is an equidigital number, since it uses as much as digits as its factorization.

551641439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 551641439 is about 23487.0483245554. The cubic root of 551641439 is about 820.1355313357.

The spelling of 551641439 in words is "five hundred fifty-one million, six hundred forty-one thousand, four hundred thirty-nine".