215120344669 has 2 divisors, whose sum is σ = 215120344670. Its totient is φ = 215120344668.

The previous prime is 215120344633. The next prime is 215120344711. The reversal of 215120344669 is 966443021512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150728744644 + 64391600025 = 388238^2 + 253755^2 .

It is a cyclic number.

It is not a de Polignac number, because 215120344669 - 2³⁷ = 77681391197 is a prime.

It is a super-2 number, since 2×215120344669² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215120344609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107560172334 + 107560172335.

It is an arithmetic number, because the mean of its divisors is an integer number (107560172335).

Almost surely, 2^215120344669 is an apocalyptic number.

It is an amenable number.

215120344669 is a deficient number, since it is larger than the sum of its proper divisors (1).

215120344669 is an equidigital number, since it uses as much as digits as its factorization.

215120344669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 215120344669 in words is "two hundred fifteen billion, one hundred twenty million, three hundred forty-four thousand, six hundred sixty-nine".