551515001 has 2 divisors, whose sum is σ = 551515002. Its totient is φ = 551515000.

The previous prime is 551514973. The next prime is 551515043. The reversal of 551515001 is 100515155.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 379275625 + 172239376 = 19475^2 + 13124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551515001 is a prime.

It is not a weakly prime, because it can be changed into another prime (551515201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275757500 + 275757501.

It is an arithmetic number, because the mean of its divisors is an integer number (275757501).

Almost surely, 2^551515001 is an apocalyptic number.

It is an amenable number.

551515001 is a deficient number, since it is larger than the sum of its proper divisors (1).

551515001 is an equidigital number, since it uses as much as digits as its factorization.

551515001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 625, while the sum is 23.

The square root of 551515001 is about 23484.3565166261. The cubic root of 551515001 is about 820.0728673101.

The spelling of 551515001 in words is "five hundred fifty-one million, five hundred fifteen thousand, one".