551751061 has 2 divisors, whose sum is σ = 551751062. Its totient is φ = 551751060.

The previous prime is 551751047. The next prime is 551751073. The reversal of 551751061 is 160157155.

It is the 9590-th star number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425638161 + 126112900 = 20631^2 + 11230^2 .

It is a cyclic number.

It is not a de Polignac number, because 551751061 - 2¹³ = 551742869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551751461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275875530 + 275875531.

It is an arithmetic number, because the mean of its divisors is an integer number (275875531).

Almost surely, 2^551751061 is an apocalyptic number.

It is an amenable number.

551751061 is a deficient number, since it is larger than the sum of its proper divisors (1).

551751061 is an equidigital number, since it uses as much as digits as its factorization.

551751061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5250, while the sum is 31.

The square root of 551751061 is about 23489.3818777762. The cubic root of 551751061 is about 820.1898534226.

The spelling of 551751061 in words is "five hundred fifty-one million, seven hundred fifty-one thousand, sixty-one".