551059381 has 2 divisors, whose sum is σ = 551059382. Its totient is φ = 551059380.

The previous prime is 551059361. The next prime is 551059427. The reversal of 551059381 is 183950155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 501356881 + 49702500 = 22391^2 + 7050^2 .

It is a cyclic number.

It is not a de Polignac number, because 551059381 - 2⁹ = 551058869 is a prime.

It is a super-2 number, since 2×551059381² = 607332882776206322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 551059381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551059321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275529690 + 275529691.

It is an arithmetic number, because the mean of its divisors is an integer number (275529691).

Almost surely, 2^551059381 is an apocalyptic number.

It is an amenable number.

551059381 is a deficient number, since it is larger than the sum of its proper divisors (1).

551059381 is an equidigital number, since it uses as much as digits as its factorization.

551059381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 37.

The square root of 551059381 is about 23474.6540123598. The cubic root of 551059381 is about 819.8469776922.

The spelling of 551059381 in words is "five hundred fifty-one million, fifty-nine thousand, three hundred eighty-one".