551381657 has 2 divisors, whose sum is σ = 551381658. Its totient is φ = 551381656.

The previous prime is 551381651. The next prime is 551381693. The reversal of 551381657 is 756183155.

551381657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 551122576 + 259081 = 23476^2 + 509^2 .

It is a cyclic number.

It is not a de Polignac number, because 551381657 - 2²⁸ = 282946201 is a prime.

It is not a weakly prime, because it can be changed into another prime (551381651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275690828 + 275690829.

It is an arithmetic number, because the mean of its divisors is an integer number (275690829).

Almost surely, 2^551381657 is an apocalyptic number.

It is an amenable number.

551381657 is a deficient number, since it is larger than the sum of its proper divisors (1).

551381657 is an equidigital number, since it uses as much as digits as its factorization.

551381657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 41.

The square root of 551381657 is about 23481.5173487575. The cubic root of 551381657 is about 820.0067702197.

The spelling of 551381657 in words is "five hundred fifty-one million, three hundred eighty-one thousand, six hundred fifty-seven".