219135087601 has 2 divisors, whose sum is σ = 219135087602. Its totient is φ = 219135087600.

The previous prime is 219135087533. The next prime is 219135087623. The reversal of 219135087601 is 106780531912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215854089201 + 3280998400 = 464601^2 + 57280^2 .

It is a cyclic number.

It is not a de Polignac number, because 219135087601 - 2⁹ = 219135087089 is a prime.

It is not a weakly prime, because it can be changed into another prime (219135087671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109567543800 + 109567543801.

It is an arithmetic number, because the mean of its divisors is an integer number (109567543801).

Almost surely, 2^219135087601 is an apocalyptic number.

It is an amenable number.

219135087601 is a deficient number, since it is larger than the sum of its proper divisors (1).

219135087601 is an equidigital number, since it uses as much as digits as its factorization.

219135087601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 219135087601 in words is "two hundred nineteen billion, one hundred thirty-five million, eighty-seven thousand, six hundred one".