215300554361 has 2 divisors, whose sum is σ = 215300554362. Its totient is φ = 215300554360.

The previous prime is 215300554331. The next prime is 215300554397. The reversal of 215300554361 is 163455003512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114687886336 + 100612668025 = 338656^2 + 317195^2 .

It is a cyclic number.

It is not a de Polignac number, because 215300554361 - 2¹⁸ = 215300292217 is a prime.

It is a super-2 number, since 2×215300554361² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (215300554321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107650277180 + 107650277181.

It is an arithmetic number, because the mean of its divisors is an integer number (107650277181).

Almost surely, 2^215300554361 is an apocalyptic number.

It is an amenable number.

215300554361 is a deficient number, since it is larger than the sum of its proper divisors (1).

215300554361 is an equidigital number, since it uses as much as digits as its factorization.

215300554361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 35.

Adding to 215300554361 its reverse (163455003512), we get a palindrome (378755557873).

The spelling of 215300554361 in words is "two hundred fifteen billion, three hundred million, five hundred fifty-four thousand, three hundred sixty-one".