215343249461 has 2 divisors, whose sum is σ = 215343249462. Its totient is φ = 215343249460.

The previous prime is 215343249419. The next prime is 215343249467. The reversal of 215343249461 is 164942343512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181566323236 + 33776926225 = 426106^2 + 183785^2 .

It is a cyclic number.

It is not a de Polignac number, because 215343249461 - 2¹⁰ = 215343248437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215343249467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107671624730 + 107671624731.

It is an arithmetic number, because the mean of its divisors is an integer number (107671624731).

Almost surely, 2^215343249461 is an apocalyptic number.

It is an amenable number.

215343249461 is a deficient number, since it is larger than the sum of its proper divisors (1).

215343249461 is an equidigital number, since it uses as much as digits as its factorization.

215343249461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 44.

The spelling of 215343249461 in words is "two hundred fifteen billion, three hundred forty-three million, two hundred forty-nine thousand, four hundred sixty-one".