551506001 has 2 divisors, whose sum is σ = 551506002. Its totient is φ = 551506000.

The previous prime is 551505973. The next prime is 551506049. The reversal of 551506001 is 100605155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373416976 + 178089025 = 19324^2 + 13345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551506001 is a prime.

It is not a weakly prime, because it can be changed into another prime (551506051) 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, 275753000 + 275753001.

It is an arithmetic number, because the mean of its divisors is an integer number (275753001).

Almost surely, 2^551506001 is an apocalyptic number.

It is an amenable number.

551506001 is a deficient number, since it is larger than the sum of its proper divisors (1).

551506001 is an equidigital number, since it uses as much as digits as its factorization.

551506001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 551506001 is about 23484.1648989271. The cubic root of 551506001 is about 820.0684064487.

The spelling of 551506001 in words is "five hundred fifty-one million, five hundred six thousand, one".